Lysithea Demetriou

**"No Touching Please!"**

## Lysithea Demetriou

* Student Uniform
* Hero Costume
* Vigilante Costume
* Civilian

## Biographical Information

### Alias

Thea (テア, *Tea*?)
Lys (リス, *Risu*?)
Lysithea Siegert (リシテア・ジーゲルト, *Rishitea Jīgeruto*?)
Princess (お姫様, *Ohimesama*?)
Undine (ウンディーネ, *Undīne*?)
Amphitrite (アンフィトリテ, *Anfitorite*?)

## Personal Description

### Age

4 (First appearance)
14 (Chapters 1-2)
15 (Chapters 3-4)
16 (U.A. Sports Festival Arc to Tartarus Escapees Arc)
17 (Current)

### Eye Color

Sea Green (Real Color)
Blue (Contacts)

### Quirk

Astral Reflection
* Infinite Space

## Status

### Family

Adelinde Siegert (Maternal Grandmother)
Auguste Siegert-D'Autriche (Maternal Grandfather)
Mikhail Demetriou (Father)
Elvira Demetriou (Mother)
Adele Demetriou (Younger Sister)

### Affiliation

Lorenz Private Academy (Formerly)
Aldera Junior High (Formerly)
U.A. High School

### Team(s)

Astra Agency (Formerly)
Shie Hassaikai Raid Team (Formerly)
Triton Agency

## Portrayal

### Japanese Voice

Satomi Satō (Anime)
Mikako Komatsu (Anime; child)

### English Voice

Xanthe Huynh (Anime; current & child)

**Lysithea Demetriou** (リシテア・デメトリウ *Rishitea Demetoriu*), more commonly known as **Lysithea Siegert** (リシテア・ジーゲルト *Rishitea Jīgeruto*) also known as **Thea** (テア *Tea*) or **Lys** (リス *Risu*) by her childhood friends, and her hero name **Undine** (ウンディーネ *Undīne*) or her vigilante name **Amphitrite** (アンフィトリテ *Anfitorite*) is an up and coming hero, following the footsteps of her Pro-Hero parents, Astra and Triton. She is in is a student in Class 1-A at U.A. High School, training to become a Pro Hero alongside her childhood friend, Izuku Midoriya. Though she wishes to follow the path her parents laid out for her as a hero, she mostly strays from the path and goes out at night as a vigilante.

## Appearance

Described by Adele as possessing beauty no other could match, Lysithea has a slim figure with ample breasts, long legs, wide hips. Lysithea is a young woman with fair skin. She has pale, sea green eyes. She has long dark purple hair with an uneven fringe tied up with black ribbons into two twintails, two gold compass rose ornaments clamped onto the tips. Her accessories consist of a gold earring designed to resemble a compass rose on her left ear, and a black choker necklace adorned with another gold compass rose.

It wasn't until recently that she started wearing a wig. During the summer of her last year of junior high, she realized that she wanted to be known as her own person. And not just as the daughter of the Pro Heroes Astra and Triton. So she decided to go by another identity without completely denying her name. She started wearing light blue wigs and contacts. Thus creating the identity Lysithea Siegert.

At school, she doesn't wear the same uniform as the rest. Before school started she requested for a custom uniform be made for her. It isn't too different from the original. Though the top does more resemble a traditional middle school uniform, apart from it being a button up instead of just a pull over. She doesn't have a red tie instead, it's a blue ribbon tied into a bow.

Lysithea's hero costume uses a sleeveless dark-blue feather dress with white trimmings (not too revealing, but not hiding anything), an extremely short dark blue miniskirt, a green bow around her chest with a blue gem in the middle, a translucent purple underskirt, and detached white sleeves with blue and golden trimmings. She wears thigh-high blue heeled boots over white stockings with blue trimmings. This outfit very much replicates a magical girl outfit.

Sometimes Lysithea wears a family relic in the form of a translucent pink hagoromo, which can disappear and reappear around her at her will. Her hair clip resembles an H2O molecule.

Her vigilante costume consists of all the same accesories apart from the wig and contacts. Lysithea also wears a low-cut blue-purple backless leotard with a detached blue-purple sleeves on her forearms and black gloves, along with a short blue-purple cloak, buttoned with a gold compass rose ornament hanging above her chest. There is a blue pendant mounted on the back of her cloak. She wears black translucent tights decorated with four-pointed stars on her left thigh. On top of her head rests a blue-purple witch hat, adorned with gold compass rose decals and ornaments.

## Personality

Lysithea is an astrologist who takes her passion seriously. She is very knowledgeable in this subject in part and respects, yet also fears her master at the same time. She combines her astrology skills with hydromancy, which makes her a well-known, if still growing astrologist. In part due to her astrology, Lysithea can tell whether or not a person is lying, can sense their intentions from a single glance, being capable of seeing their fate and is able to accurately deduce a person's traits just from knowing what their constellation is.

Being obsessed with astrology gives Lysithea a sense of pride, but this also serves as a double-edged sword; any money she gets her hands on is immediately spent on astrology-related materials, regardless of its cost. She only realizes too late when she has run out of money to meet her daily needs, occasionally going without shelter or food for days on end. She is particularly picky when it comes to eating, as she prefers simple dishes when eating out; when she cooks, she makes the most out of whatever she can buy. She does not tolerate those who disrespect her. She also makes a lot of denials when someone is pointing out what she doesn't have. So her money spending habits, it now monitored by her aide, Yugo Akamatsu, who is a student of U.A. High School's Department of Support from Class 1-H.

Though she's very prideful, Lysithea has an interesting yet troublesome personality. She is high-spirited, cheerful, and carefree, but rarely thinks about the consequences of her actions. While she doesn't force her beliefs onto others, Lysithea always acts or speaks on her whims. As a result, she can behave very inappropriately in many situations. It is also very easy to taunt Lysithea with jeers or lure her with praises. Since Lysithea, is very prideful, she thrives on praise/worship points, she usually performs good deeds, but then immediately ruins her own merits by seeking praises aggressively and persistently. Also, while many of her 'good deeds' turn out fine, Lysithea is very short-sighted, and some of these 'good deeds' turn out to be complete disasters.

One of Lysithea's positive personality traits is her "honesty." She is incapable of lying, or more precisely, she has no concepts of lying and she is so bad at it that her lies give themselves away. When caught lying, all it takes are pinches to her cheeks for Lysithea to reveal everything. On the other hand, she is very gullible and does not want to believe people can lie to her, this belief of her's is often shut down by her astrology. When Lysithea is being stubborn though, others may also fib a little to make Lysithea more agreeable. While Lysithea thinks very highly of herself, she has a business sense that is equal to or worse than Katsuki Bakugo.

Contrary to what most people believe, Lysithea is not completely stupid. Lysithea can be very observant and knowledgeable when she wants. At times, she and Tenya Ida serve as the team's walking encyclopedias. Lysithea simply lacks the basic analytic skills and self-awareness to use her knowledge effectively. She can be very tolerant, and will easily accept and forgive other people's imperfections and mistakes. Part of her understanding nature, though, is an extremely bad short-term memory, as she sometimes forgets her own identity as a person when enjoying her hero work too much. Also, despite her apparent vanity while seeking praises, Lysithea is unaware of the true greatness of her artistic and priestess abilities, as she had nonchalantly performed many extraordinary, nearly-impossible feats.

## Abilities

### Quirks

**Astral Reflections**

* **Water** (水流 *Wōtā*): Lysithea is able to produce, control, and manipulate water because she is an extremely skilled Water user. She can use the water in a number of different ways, such as making water blades that can even cut through solid rock and metal, boiling beams, waves with a lot of force and power to hurt her opponents, or even putting them in miniature water prisons. Additionally, Lysithea can transform into water without apparent thought, allowing both physical and magical attacks to pass through her unharmed. When she is in an emotional state like extreme anger, her power is greatly increased. She can also be frozen and reshaped into a variety of things by people with ice-related quirks when she is in her liquid state.
	+ **Water Body**: Lysithea is capable of transforming into a mass of water, rendering any physical attack pointless. When Katsuki Bakugo became enraged and attacked Lysithea once when they were younger, the attack simply phased through her body without Lysithea taking any action to defend herself. This spell appears to be constant.
		- **Sierra** (シエラァ *Shierā*): A full body transformation resembling Water Body, used by Lysithea in a state of strong agitation or other influencing emotion (e.g. jealousy or rage). Her strong emotions cause her full body transformation to heat up/boil, this being to a temperature which Shoto Todoroki was unable to freeze at first. This is a short ranged attack which displays enormous, unpredictable speed.
	+ **Water Bubbles**: Lysithea has the ability to create bubbles of water which can be used as containers that stores oxygen. This can be worn by different users and the bubble size is modified according to Lysithea's will. It can be used during long-term, undersea travels, which requires a great supply of oxygen.
	+ **Water Slicer** (水流斬破 *Wōtā Suraisā*): Lysithea creates a single wave of multiple blades that resemble scythes which may be used as projectiles. The enormous pressure emitting from the blades is strong enough to cut through whatever they may encounter, as seen when Lysithea attempted to attack the villains that infiltrated the Unforseen Simulation Joint, but instead sliced a stone pillar to pieces.
	+ **Water Cane** (水流烈鞭 *Wōtā Kāne*): Lysithea creates a whip-like structure made ​​of water, usually being an extension of her own hand. It has a tremendous range and is often used as a long-distance attack against a single opponent. It can attack with great speed, flexibility and pressure, and seems to be used like a whip.
	+ **Water Dome** (ウォータードーム *Wōtā Dōmu*): Lysithea creates a large dome made ​​of water that camouflages with the ocean. The size can be modified for individual use or to contain a group, and the structure is able to float on water.
		- **Water Lock** (水流拘束 *Wōtā Rokku*): Lysithea has the ability to materialize a large circular mass of water, and unlike the **Water Dome**, it contains no oxygen inside. This spell is used to capture enemies and incapacitate them by suffocation.
	+ **Water Jigsaw** (水流激鋸 *Wōtā Jigusō*): Lysithea may transform her body into a rapidly spinning cone, which is surrounded by a swirling mass of blades. The blade's properties resemble Water Slicer. It is a short-ranged attack directed against a single opponent.
	+ **Water Ray** (ウォーターレイ *Wōtā Rei*): Lysithea releases a ray of water from her hand to attack her target.
	+ **Water Nebula** (水流昇霞 *Wōtā Nebura*): Lysithea creates two columns of water, which rotate around each other and forms a helix that pushes the opponent with huge force, causing massive damage. It is used primarily for long distance attacks against a single opponent.
	+ **Water Cyclone** (水流台風 *Wōtā Saikuron*): Lysithea casts a whirling torrent of water which resembles a cyclone.
	+ **Water Claw** (水流双牙 *Wōtā Kurō*): Lysithea slashes her water-covered hands, creating a torrent of water that engulfs her target.
	+ **Conjuring Rain:** Ever since her younger years, Lysithea has had the ability to conjure rain, although she has no control over it, the rain appearing to merely be dictated by her emotional state. This often happened when she first moved to Japan with her parents.
	+ **Breathing Underwater:** Lysithea has the ability to breathe underwater, as seen during when Class 1-A went swimming.
	+ **Dissolve:** Lysithea has the ability to dissolve into bubbles when she runs. This ability is one she can control, though sometimes it just happens when she walks.
* **Catroptromancy** (also known as captromancy or enoptromancy): Is a term derived from the Ancient Greek words: κάτοπτρον katoptron, "mirror," and μαντεία manteia, "divination." This type of divination consists in predicting someone's future or also discovering their past through the use of a mirror, or any surface that may reflect light, like water. This practice was common in Classical Greece and Ancient Rome. This is the otherside to her quirk.

### Drawbacks

Excessive use of Astral Projections, specifically the water attribute causes her to fall sick for long periods of time. Usually lasting from two weeks to month. During this period of time, she will usually go back home to her family estate, until she has fully recovered. At this time, Adele and Yugo would take time off to take care of her.

## Relatives

* Adelinde Siegert (Maternal Grandmother)
* Auguste Siegert-D'Autriche (Maternal Grandfather)
	+ Elvira Demetriou (Mother)
	+ Mikhail Demetriou (Father)
		- **Lysithea Demetriou**
		- Adele Demetriou (Younger Sister)

## Trivia

* Lysithea is derived from Greek *λύσις (lysis)* meaning "a release, loosening" and *θεά (thea)* meaning "goddess". This was the name of a lover of Zeus in Greek mythology. A small moon of Jupiter is named after her.
	+ Demetriou is derived from Demetrius, Latinized form of the Greek name *Δημήτριος (Demetrios)*, which was derived from the name of the Greek goddess Demeter. Kings of Macedon and the Seleucid kingdom have had this name. This was also the name of several early saints including a Saint Demetrius who was martyred in the 4th century.
* She is the daughter of two well known Pro Heroes, Astra and Triton
* She is given a monthly allowance by Yugo Akamatsu.
* Once, Lysithea cried because she dropped 100 yen down a sewage drain that was going to be used for ice cream.
* Lysithea is one of the few currently characters who acknowledges (or even seems aware) that Izuku Midoriya is One For All's successor. She was able to find this out through her astrology.

## Quotes

* (To Class 1-A) *"I've always been very proud of my talent in astrology. I believe that astrology is a valuable discipline, and that it is capable of revealing the inner workings of this universe. When people discovered I could perform divination, they began to bombard me with inquiries. "When is my missing son going to be found?" "Do they love me or not?" "Will I ever recover?" Being the honest person I am, I told them exactly what I saw through the scryglass. Though honesty may bring about resentment, I—I couldn't lie in the face of such a noble art. "Astrology is a scam!" "That's insane!" "Can you please leave me alone now? I need some space..." It felt as if I was being stabbed with razor-sharp knives formed by their disappointment. I could see the future, yet I felt miserable... as if I'd fallen into an abyss."*
* (About Adele) *"I am confident in Adele's abilities. But I want her to be able to hold on to her innocence. She shouldn't have to get personally involved in power struggles, or confront the darker side of life head-on. As her older sister, it's my job to shield her from all of that... Heh, just... between the two of us, of course. Sorry, that got a little more private a little more quickly than I'd intended."*
* (To Izuku) *“I don’t want people to be worried about me. There’s nothing to worry about. I don’t want people to try and understand why I’m the way I am, because I should be the first person to understand that. And I don’t understand yet."*
* (To Overhaul) *"People born into this world can feel joy, sadness, rage and other emotions so strongly they tremble. But that's all a mystery to you isn't it? You've never felt happiness. Felt enjoyment. Felt pain. Felt bitterness. In fact, you're nothing but an empty shell. It's quite comical, it's so stupid. Why were you even born?"*

## Original Characters

* Mona Megistus - Genshin Impact (Abilities, Appearance, Personality, Trivia, Quotes)
* Juvia Lockser - Fairy Tail (Abilities)
* Aqua - Kono Subarashii Sekai ni Shukufuku wo! (Appearance, Personality, Trivia)
* Kamisato Ayato - Genshin Impact (Quotes)
* Victoria Spring, Solitaire - Alice Oseman (Quotes)
* Aoi Sakurada - Joukamachi no Dandelion (Relationships)
* Yona - Akatsuki no Yona (Relationships)
* Kanao Tsuyuri - Kimetsu no Yaiba (Quotes)