Eterna Rinebow

* Manga
* Light Novel

## Appearance

Despite being at least sixty years old, she has the appearance of a teenage girl. She has the appearance of a typical witch. She has a large, oversized hat along with blue beads attached to it. She has bright pink eyes and long blue hair.

Eterna has two round bird creatures that accompany her that help her with her magic. As shown in the manga, they appear to reflect her opinion on other characters. While they show anger towards Jean, they reacted positively to seeing Flum.

## Personality and Character

Eterna generally comes off as a stoic person, and she isn't afraid to speak her mind. While Flum admits she sometimes doesn’t always get how Eterna feels about something, Eterna cares more about others that she initially lets on as she is shown to be loyal to her roommates and friends. Without much prompting, she willingly decided to help cure Milkit’s poisoning as well as act as her protector when Flum wasn't able to do so. Additionally, while she was tempted to leave Flum, Milkit, and Ink behind to have a new life with her deceased parents, she decided her life with her roommates was far more important to her.

If something angers her, she will not hesitate to show it as she could not hide her shock and disgust after finding out that Jean sold Flum into slavery. She becomes even angrier when Flum told her that Jean lied about her and Gadhio along with the other members of the Hero Party were in favor of selling her. She expressed interest in getting revenge on Jean on Flum's behalf only deciding not to do so because she didn't have the means to.

After becoming Flum and Milkit’s roommate, she demonstrates a playful, teasing side. Eterna is also shown to be open to the idea of homosexuality as she loves teasing both Flum and a Milkit regarding the status of their relationship. She is strongly in favor of the two of them getting together. The narration indicates she is glad that Flum and Milkit make each other happy.

Eterna also can be protective of others, but she is respectful of other people’s wishes as well. During Episode 03, she offers to help Flum deal with Dein on multiple occasions, but she respects Flum’s request to protect Milkit while she is out in the city. When Dein’s men do attempt to kill Milkit, Eterna casually wipes them out due to her disgust at how they would attempt to harm someone as helpless as Milkit. She also willingly puts herself in harm's way when Dein attempts to make Milkit a target for Ink’s eyes.

While Eterna outright states she isn’t a teacher, she is willing to teach those that are interested and willing to learn. During the their time in the Hero’s Party, she taught Flum quite a bit about herbs to the point Flum knew Milkit was inflicted by Mustardo poisoning, and she knew what herbs were necessary to make a cure. During Episode 03, she teaches Flum a few things regarding magic that prove to be invaluable to Flum learning how to use her Reversal Affinity offensively in battle outside of equipping Cursed Equipment.

## History

When Eterna was a child, she was chosen to be a test subject by the Church of Origin. The experiments were what resulted in Eterna eventually losing the ability to age at the same rate as others. During her time of being experimented on, she was adopted by the Rinebow family who taught her many things, such as about medical herbs. They came to love each other as a real family.

At an undisclosed time, the experiment was shut down, and Eterna was meant to be killed. However, Eterna’s parents allowed her to escape. For over fifty years, Eterna would continue to live in the mountains. During that time, she aged very little over that time. , and she would put what her parents taught her to use.

Eventually, after earning the title of the Timeless Witch, she is chosen by Origin to become a member of the Hero's Party. She joined partly to learn what became of her parents. During the course of her adventures, she met and befriended Flum Apricot and Gadhio Lathcutt.

## Synopsis

### Episode 01

Eterna is introduced, along with Gadhio Lathcutt, going on a shopping errand with Flum. Apparently, Eterna goaded Gadhio to help her with a shopping errand of her own, and they happened to run into Flum who was buying groceries for the Hero's Party. They both decided to help Flum to which Flum was grateful.

When Jean sells Flum into slavery, Flum had a hard time believing that Eterna and Gadhio would agree to sell her. Jean merely tells her they 'objected' at first, but they agreed because Flum is more of a burden on them than any of the others. While Flum initially refused to believe it, she ultimately accepted Jean's words. However, it was revealed to be lie because neither she nor Gadhio were aware of what Jean intended to do with Flum.

A few days later, Jean lies to the Hero Party that Flum left on her own accord. While Eterna did not say a word, she seemed disappointed that this happened. It became clear that Eterna's motivation to remain in the Hero Party began to wane.

### Episode 02

During the battle with one of the Demon Generals, Tsyon, Eterna becomes irritated by Jean’s attitude and blaming her for the battle not going well. Eventually, the Demon Generals retreated much to confusion of Eterna and the other members of the party.

In the aftermath of the battle, Eterna saw no value in staying in the Hero's Party. Between Jean's poor attitude along with Flum’s departure, Eterna decided to leave the Hero’s Party. After discussing it with Gadhio, Eterna says farewell to the other members before making her exit.

Toward the end of the Episode, Eterna is found by Flum and Milkit squatting in Flum's House. Flum was rather surprised to find Eterna there while Eterna was surprised that Flum was still in the Capital. She then noticed Flum had a Slave Crest on her left cheek, and she inquired about how she got that. It was then she learned that Jean had lied to them about Flum leaving to go home, but he had actually sold her into slavery. Likewise, much to her anger, Jean lied to Flum by telling her that everyone, including Eterna, approved of selling Flum into slavery.

Understandably, Eterna was angered by this revelation, but she also showed sympathy regarding what happened to Flum. She also was sympathetic when she noticed Milkit suffered from Mustardo poisoning. When Flum provides her with the necessary herbs to cure Milkit, Eterna immediately agrees to make it.

While Eterna was willing to leave the house if Flum didn’t want her, Flum happily accepted Eterna as a member of the household. For the following few days, Eterna works on Milkit’s treatment and succeeds in curing Milkit. After Milkit has been cured, she allows Flum and Milkit some privacy to respect their wishes. However, after Flum and Milkit remained alone in their room for so long, Eterna couldn't help but be curious about what was taking them so long to take off Milkit's bandages.

During the side story, Eterna pokes fun at how Flum is aroused at the idea of seeing Milkit’s face or taking a bath. Flum continues to deny Eterna's speculation much to Milkit's amusement.

### Episode 03

Eterna has become an established member of Flum’s household. After becoming a member of Flum’s house, Milkit regularly cooks meals for Eterna that she enjoys along with fulfilling her requests, such as making her tea. Flum also allows Eterna to conduct her experiments and research. Additionally, Eterna also attempts to create her own tea to sell, so she can avoid being a freeloader to Flum and Milkit. Much to her chagrin, her desk ends up being used to house a number of handcrafted figures of Flum that Milkit made. However, she does acknowledge they are well made.

After Flum and Milkit return from a shopping trip, they bring along a young girl with bandages around her eyes, named Ink Wreathcraft. While the girl claims to have amnesia, Eterna and Flum don't believe her, but they are willing to give her shelter. Eterna could see that Ink was experimented on the Church just like she was. She allows Ink to stay in her room, and she quickly develops a bond with her.

During the first half of the Episode, Eterna offers to help Flum deal with Dein Phineas, who had been causing Flum and Milkit a lot of trouble ever since Flum became an Adventurer, but Flum refuses. Instead, she asks Eterna to stay at the house to protect Milkit. This proves to be wise as while Dein attempts to kill Flum with his men and corrupt guards, Dein sent a number of men to attack Flum’s house and kill Milkit. Eterna makes short work of them.

Eterna manages to save Ink’s life by removing the Origin Core in her body and transplanting Dein’s heart. Afterwards, she keeps Ink isolated in her room to keep her under watch.

### Episode 04

Eterna is awoken by Ink who tells her that dinner is ready.

During Episode 04, it was revealed that Flum's House, used to belong to Eterna’s adoptive parents.

Eterna is offered a chance to have a new life with her resurrected parents, but she decides the new life she has formed with Flum, Milkit, and Ink is more important.

After Nekt decides to retreat and Gadhio had left, Flum's group is left without any leads to find the village. Flum and Milkit decide to follow up on a potential lead of their own while Eterna would take Ink along with her to meet Welcy. Eterna's meeting with Welcy proved to be fruitful as she had potential information on the location of the village.

Eterna and Ink meet with Eterna's resurrected parents before they are turned into monsters and Eterna is forced to kill them both.

In the aftermath of the battle, Eterna makes note of the fact that her parents bodies were destroyed, but she recognizes that if they weren't destroyed they might be used against her in another capacity.

### Episode 05

At the beginning of the Episode, she is feeding Ink breakfast much to Milkit's envy.

After Ink overhears Flum and Milkit's conversation regarding Flum's friendship with Cyrill, she asks Eterna what is the nature of Flum and Milkit's relationship. Eterna simply tells her that she couldn't tell her.

At the end of the Episode when Flum is in Cyrill’s arms, Eterna teases Flum about ‘cheating’ on Milkit much to Flum’s chargin.

## Adaptation Differences

### Episode 02

Eterna's role in the manga largely remains the same in the manga until Dein kidnaps Milkit. Eterna takes on a role in the search party, and she is attacked by the Spiral Children and forced to hold them off while Flum goes on ahead to save Milkit.

After Flum manages to save Milkit, Eterna watches them along with Ottile and Sara.

## Abilities/Equipment

* Water Affinity: Due to Eterna's affinity, she has mastery over water magic which allows her to use it for both offensive and defensive purposes. She also uses it to supply water in Flum's house, such as to fill up the bath.
* Extended Lifespan: Due to the experiments Eterna was subjected to, her lifespan was greatly increased as the aging process was reduced. Despite being at least sixty years old, she still has the appearance of a teenager. It is unknown how long her life can last.
* Medical Knowledge: Eterna is highly intelligent, but she is extremely proficient in knowledge regarding medical herbs. She also knew enough to be able to conduct surgery.

## Relationships

### Family

Eterna has no knowledge of her biological family. The only family she knows are her adopted parents, along with the other children who were experimented like she was. They taught her everything she knew about herbs and medicine.

One of the reasons Eterna accepted the summons to join the Hero's Party was to find out what happened to her parents. She made sure to visit their graves.

When they were brought back to life by the Necromancy department, she felt tempted to live with them again, but she ultimately rejected it because it was in the past. She was infuriated that their graves were disturbed to make that happen.

### Roommates

As a whole, Eterna is shown to care for Flum, Milkit, and Ink. During Episode 04, she was given a tempting offer to have a new life with her resurrected parents, but she knew that would mean betraying them. In the end, she choose to be loyal to them because she believed the new life she formed with her roommates was more important. She is also shown to be protective of her roommates, especially Milkit and Ink.

**Flum Apricot**

During their time in the Hero’s Party, she along with Gadhio were the only ones to consistently treat Flum well. Likewise, Flum was one of the only people she considered to be a friend. She taught Flum about herbs, helped her with errands, and she liked having Flum around. After Flum ‘left’ the Party, she quickly lost interest in remaining part of the group, especially due to Jean becoming even more difficult to deal with. As a result, Eterna decided to leave the Hero's Party during the interlude between Episode 01 and 02.

Towards the end of Episode 02, Flum and Eterna are reunited. Eterna learned the truth regarding Flum’s departure, and she made it clear she had no knowledge of Jean selling Flum into slavery. She was especially angry that Jean lied and told Flum that she approved of such an action. She was willing to get revenge for Flum if she knew where Jean was or had access to him.

Despite this house originally belonging to her adopted family, Eterna recognized that it legally belonged to Flum. When Eterna was willing to move out of Flum’s house, Flum was more than willing to let Eterna stay as a roommate which was grateful for. Likewise, Eterna was also more than willing to fulfill Flum’s request to cure Milkit’s face after being provided with the necessary medical herbs.

During Episode 03, Eterna was willing to help Flum deal with Dein Phineas, but she respected Flum’s wishes to protect Milkit. She did show concern for Flum’s wellbeing, but she honored Flum's wishes and kept her promise. Likewise, Flum was concerned for Eterna when Eterna was forced to flee from the mysterious 'Eyes' that attempted to kill her, and she was glad to see Eterna was alive and well.

After Milkit was kidnapped and Flum killed Satils Francoise to save her, Eterna was informed of the activities by one of Leitch Mancathy's messengers. She admonishes Flum for not getting her before rushing to save Milkit, but decides to hold back after Flum promises she will do better.

**Milkit**

Shortly after meeting her, Eterna was quick to diagnose that MIlkit was infected by Mustardo poisoning. She also displays disgust on how cruel someone must’ve been to do something like that to Milkit. Upon receiving the necessary herbs from Flum, she quickly agrees to cure Milkit’s condition to which Milkit was grateful to both Flum and Eterna for.

The two are consistently on good terms. Eterna treats Milkit well, and she doesn’t look down on Milkit due to her past as a slave. Likewise, Milkit is respectful of Eterna, and makes sure to do a good job cooking her meals as well.

When Flum is not around, Eterna acts as Milkit’s protector, as per Flum’s request. This was best demonstrated in Episode 03 when Eterna defended Milkit from Dein’s men who came to burn down the house and kill Milkit. Due to how the men were attempting to murder Milkit and potentially do worse to her if she survived, Eterna didn’t care what happened to them when she literally used her power to wash them away. Milkit was briefly surprised by this display of power, but she agreed with Eterna’s mindset.

**Ink Wreathcraft**

Due to the two having similar backstories with being experiments of the church, Eterna saw Ink as a kindred spirits to an extent.

Eterna played a major role in saving Ink’s life from the Origin core.

During Episode 04, Ink showed some insecurities about being blind and not useful. Eterna makes it clear that she enjoys Ink's company. After Satils turned Eterna's parents into monsters, she didn't hesitate to kill them and protect Ink. Ink would later comfort Eterna about the fact she had to kill her reanimated parents even if they had been turned into monsters.

### Other Allies

**Gadhio Lathcutt**

He was the only other member of the Hero’s Party that Eterna got along with besides Flum. When she decided to leave the Hero’s Party, she told Gadhio about it first, and he was fine with it. In Episode 03, Eterna correctly guesses Gadhio would leave the party soon as well.

When they reunite in Episode 03, they have no issue being allies again. In Episode 05, they work together to defeat the Spiral Children.

**Welcy Mancathy**

Eterna met Welcy while she, Flum, Milkit, and Ink were investigating about the village that would be home to the resurrected people. She respected Welcy's ability to gain information.

### Enemies

**Jean Inteige**

Even before finding out Jean sold Flum, Eterna and Jean got along as well as water and oil. She was even remotely willing to tolerate him due to Flum acting as a buffer between her and other members of the party. After Flum had 'left' the party, Jean's attitude towards other members of the party, especially her, became far worse to the point it was unbearable. Jean's poor attitude was one of her main motivations to leaving the party.

When she finds out that Jean sold Flum along with lying to her that she and Gadhio were in favor of selling Flum, her stance towards him shifted from being annoyance to disgust and anger. She would openly insult him in front Flum and Milkit after learning the truth. When asked about Jean by Milkit, she makes it clear that she would give Jean a piece of her mind if she ever were to cross paths with him again.

**Dein Phineas**

While Eterna only directly interacted with Dein once, she was very much aware of what kind of person he was based on what Flum told her. During the first half of Episode 03, Eterna was willing to help Flum take him out, but she told her to remain at the house to keep Milkit safe from him. This proves to wise as Dein sent men to kill Milkit that Eterna easily dispatched, and he was angered by her interference.

When they met face-to-face, she knew he was up to something. She was able to prevent Milkit from becoming a target of his machinations much to his annoyance. While she was forced to go on the run for a while after he set up his trap, she was ultimately able to survive it. At the end of Episode 02, she didn't hesitate to transplant his heart into Ink's in order to save her life.

**Satils Francois**

She was disgusted to find out that she kidnapped and tortured Milkit was didn't mind the fact that Flum killed her.

## Gallery

### Light Novel

#### Illustrations

Flum discovers that Eterna is living in her newly bought houseEterna looking at Flum with astonishment and horror upon hearing her ideaEterna hugging Ink for comfort before meeting her parents

## Trivia

* In the manga, the bird creatures Eterna has seem to mirror the opinion Eterna has of other people. They showcase her distaste for Jean. By comparison when they saw Flum, they were rather happy as indicated by the ‘heart symbol’ over its head.
* Eterna only guesses that she is sixty years old. She isn't actually sure what her real age is.
* Eterna's name is most likely a play on the word 'Eternal' due to how the unspecified experiments she went through might've made her 'Eternal' or the closest thing to it.