Yūma Kuga

 This article is about the character. For other uses, see Yūma Kuga (disambiguation).

"I got permission from my leader. This time, I'll be playing with you."

- Yūma Kuga to Kō Murakami

Yūma Kuga is one of the five main characters in the manga and anime series World Trigger and the main protagonist of the series. He is a B-Class Attacker and member of Mikumo Unit. He is a Neighbor.

Appearance
Yūma is very short for his age. He has white hair and red eyes. It is later revealed that his hair is originally black and his body stopped growing ever since he was 11 years old as it is made out of Trion, thus explained his short stature.

He wears a blue suit top and gray bottoms traditional of Japanese highschool students. When not in Trigger mode or school uniform, he usually wears a purple hoodie with a paw symbol and the text "UMA" (which stands for "Unidentified Mysterious Animal"), and beige baggy jeans pants.

In Black Trigger mode Yūma gains a black jumpsuit which Replica fuses itself with. In C-Class trigger mode, unlike most other trainees, he gains an all-black uniform, instead of the classical all-white one; it has a black jacket with thick white stripes running down from the sides of his collar to the sides of his sleeves and also around his collar, and thin gray stripes in the borders of the zip fastener and collar.

In B-Class trigger mode, he has a uniform similar to Osamu's, except his jacket's left sleeve doesn't have a shoulder guard. His right arm also has the same design as his left, unlike Osamu's, making his jacket more symmetrical. Also, the black stripes on his jacket's sleeves are thinner and, unlike Osamu's, don't have white stripes in their middle, and the black stripes also go over his shoulders and collar. On the sides of his shoulders, he has Tamakoma Branch emblem, surrounded by the stripes. In addition, the sleeves of his jacket somewhat merge with his gloves, and he tucks his pants inside his boots, like when he was a C-Class agent. His Unit's emblem is located on his left chest.

Personality
Yūma has a laid back personality and is not very knowledgable about Japanese customs, due to being from another world (despite having a Japanese father), leading to some run-ins with rough people. He is logical, advising Mikumo to stay away from the Trion Battle Soldier rather than save the students as Mikumo could die. He seems to be aligned with Border's cause, fighting against Neighbor forces. Despite his happy exterior, he is actually deeply depressed due to his father's sacrifice to revive him, and had no more reason to live for other than bringing him back to life.

Relationships
Osamu Mikumo: Yūma and Osamu share mutual respect for one another. Yūma admires Osamu for his honesty, sense of duty, and eagerness to help others at a cost to himself. Osamu looks up to Yūma for his fighting experience and strength. He wants to give Yūma reason to keep living. Yūma is considerate of Osamu's position in Border. He tries to advance Osamu within the organization's ranks and decides to take on the task of taking Osamu and Chika to A-Class.

Chika Amatori: Yūma is impressed by Chika's abundance of trion. Just like Osamu, Yūma is affectionate towards Chika and strives to make sure she is safe.

Yūichi Jin: Yūma respectfully acknowledges Jin's strength, admitting that he might lose to Jin in a fight. However, he trusts that Jin would not become his enemy. Jin looks out for Yūma, directly facing off against HQ multiple times to stand up for him. When HQ sends the Expedition Force for Yūma, Jin refers to him as his "cute junior" and proceeds to fight for him.

Yūgo Kuga: Yūgo is Yūma's father. Yugo tries to keep Yūma out of danger by discouraging his participation in serious battles, but Yūma does not take him seriously. As a father, Yūgo took time to teach Yūma life lessons. He loved Yūma deeply and died to save him, passing on his side effect and black trigger. Yūma wishes to bring his father back to life. He is baffled by why Yūgo sacrificed himself for a son who got himself killed because of his own disobedience.

Replica: Yūma seems to enjoy Replica's companionship and respect his opinion, and becomes devasted when Replica is deactivated and taken away to Aftokrator.

Kirie Konami: Kirie singled Yūma out as the strongest of the Osamu-Chika-Yūma team and agreed to help train the team only if she got Yūma. She looks down on Yūma as "midget" while demanding his respect. They form a mild rivalry during training, and both see the other as a worthy opponent. Kirie seems competitively proud of her trainee, proclaiming Yūma's potential to the team when Chika was considered the best candidate first.

Shun Midorikawa: After Midorikawa defeated Osamu in Battle, Yūma stepped in beating him after deliberately losing the first few rounds, completing the deal of Shun calling Osamu "Senpai", and they both quickly become friendly rivals afterwards. Later, Shun starts dressing like Yūma, though it might just be his unit's uniform. Midorikawa is the only person other than

Quotes

 * (Talking to thugs.) "I told you that I'd send you flying. You guys... Shouldn't lie."
 * (To Shūji Miwa) "Now then, why don't we have a little discussion?"
 * (To Shiori Usami) "Hmph. In other words, if I want to become a B-Class, it'll be alright if I kick the C-Class guys' asses."
 * (To Viza) "You know.... You make up some stupid lies."
 * (To Viza, quoting Osamu) "Even though my chances of winning are slim, I still can't run away."
 * (To Takumi Rindō) "I'm not really upset, we all trained the same way. I won't be able to win all the time, but, fighting strong people is fun. The person who thought of ranked matches is smart, especially the part where the loser doesn't die."
 * (To Kō Murakami) "I got permission from my leader. This time, I'll be playing with you.."

Trivia

 * Yūma has an habit of doing duckfaces, which have become a meme among the manga's fans.
 * Yūma tends to scare people with his eyes.
 * The "UMA" in his hoodie might be a reference to his name, as "UMA" (ユーマ) and "Yūma" (遊真, ゆうま) are homophonous in Japanese.
 * Yūma apparently dislikes being called "senpai", as he tells Midorikawa to call him just "Yūma" when the later calls him "Yūma-senpai".
 * Ironically, he previously ordered Midorikawa to call Osamu "senpai" should he defeat him in battle.
 * He likes Japanese food.
 * He came second in the First Character Popularity Poll.

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