Hikaru Gero

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**Hikaru Gero** (下 (げ) 呂 (ろ) ヒカル, *Gero Hikaru*) is the main protagonist of *Marriagetoxin* series. Hikaru is the current head to the Poison clan who is part of the Gero Family, one of the top five families of specialists.

## Name Etymology

* The name **Hikaru** may come from the word ***Hikari*** means "*light*" (光) (**hikari**).
* Hikaru's surname **Gero** means "*under/below/descen*d" (下) (**ge**) and "*spine/backbone*" (呂) (**ro**).

## Appearance

Gero is a tall man with short blue hair and red eyes. Under his right eye is a scar that stretches from the edge of his lower eyelid, to just bellow the bottom.

He usually wears sweatshirts and glasses.

Sometimes he uses a gas mask to avoid the effect of the poison he uses.

## Personality

Gero is a specialist known as the "poison-user", When injecting himself with poison, he gains enhanced reflexes and strength.

Despite being a murderer and having been trained not to trust anyone, Gero is a good person and tries to help other people.

During his childhood he was a suspicious person because people used to want to get close to him, because of his grandmother.

Over time and thanks to Toshiki's help, Gero began to trust people, although he still tries not to get close to everyone.

He respects his friends a lot and wants to have a normal lifestyle.

## Background

Born into the Gero family, Hikaru was trained in assassination techniques and traps.
 During his childhood, he and his sister used to be taken to the Gero family's human zoo where they watched various people live their own lives enclosed in crystals, in that place they observe the daily life of various families.

Some time later, Hikaru would be chosen as the future head of the Gero family.
In one of his meetings with the Hanamaki clan, Gero would be introduced to them as the future head of the family, at that meeting Gero would meet Toshiki for the first time, who would initially be introduced as Gero's subordinate.
 After that meeting, Toshiki would try to get closer to him.

Some time later, Gero would have a mission where he would end up saving Kimie Arashiyama who would become his biggest fan.

In that same mission, Gero would have calls from Toshiki who would try to drink with him, from there both would become good friends.

Currently, Gero is a ruthless killer who fulfills his missions but longs for a normal life. His family tried to force his sister to have a child to be the future head, which bothered Gero so he would try to find a partner on his own.

## Relationships

### Family

#### Unnamed Grandmother

Their exact relationship is unknown but it is known that Gero has a lot of respect for her.

#### Akari Gero

Akari is Hikaru's younger sister whom he loves where this connection is so great that he supports her in her relationship with her girlfriend and even telling her that she shouldn't abandon her just for the welfare of their family.

#### Teruaki Gero

Teruaki and Gero have known each other since they were children since they both belong to the Gero family. Together with him and Akari they had a training where Teruaki would pass out to which Gero would carry him until he was conscious again showing his appreciation towards him. According to Gero, Teruaki is like a brother to him.

### Friends

#### Mei Kinosaki

Gero is always travelling with Mei to find himself an ideal wife. At first he thought kinosaki to be a girl and asked her hand for marriage in exchange for saving her.
Kinosaki helps Gero in all type of situations in order for him to find an ideal marriage partner for himself.

#### Toshiki Hanamaki

Gero and Toshiki are drinking friends, they both get along well and Gero usually tells him about all aspects of his life. Gero respects and admires him a lot since, according to his own words, he tries to find the ideal woman due to Toshiki's influence in his life.

#### Tsunagi

Gero and Tsunagi have a good friendship. Despite the fact that Gero is from a family superior to his, both treat each other as friends.

#### Piichi Nakagawa

Although at first they were enemies, due to Piichi's help in the fight against Toshiro they both ended up being friends and colleagues. Gero admires Piichi due to his love experience and his relationship with Marin.

#### Kyoko Himekawa

Gero would save her from her kidnapper. Because of this Himekawa would appreciate it by going to celebrate with him.
 Although at first, Gero would have her as a possible couple, he decided to be friends first. Currently they are usually in contact and usually go out from time to time.

#### Shizuku Ushio

They met as enemies during Gero's first mission, Gero would save Ushio from dying during their fight which would make Ushio owe Gero a favor. Some time later during the infiltration of Dogo Animal Kingdom, Ushio would save Gero from dying, which would make them become allies from that moment on.

#### Shiori Ureshino

Gero would be hired as her bodyguard because she could be killed by her aunt, after completing his mission Ureshino would thank him by having drinks with him and Kinosaki and becoming his friend.

#### Kimie Arashiyama

Although Gero doesn't know it, he would save Kimie from her kidnappers on one of his missions when he was a child, this made Kimie admire him and become his fan. Gero currently admires her due to being able to ask another specialist for help.

## Abilities

* **Poison Specialist:** Gero is the successor of the long going poison clan. Gero was trained to be able to withstand any type of poison in existence.
* **Physicality:** It is also known that Gero is extremely fit and physical. It was clearly shown in Chapter 1 about how agile he is. Despite this, Gero is not good at close combat.
* **Trap Specialist:** Gero was trained to use traps to defend himself so he is able to create these quickly.
* **Poison Blood:** During his fight with Toshiro Dogo, Gero would access the Poison Blood state, which allows him to have greater agility and less tolerance to poison.

## Trivia

* The author previously thought of making a female main character for the series, but then changed his idea after the editor told him not to, so he stuck with the same "Gero" name from the one-shot.

## References

1. ↑ Hikaru Gero Birthday
2. ↑ Hikaru Gero Birthday
3. ↑ *Marriagetoxin Manga: Chapter 7 (Page 3)*
4. ↑ *Marriagetoxin Manga: Chapter 23 (Page 11)*
5. ↑ *Marriagetoxin Manga: Chapter 36 (Pages 6-9)*
6. ↑ *Marriagetoxin Manga: Chapter 20 (Pages 11-14)*