Yahiko Totsuka

Yahiko Totsuka is one of the students of class 1-A.

Personality
As a student of the upper classes, Yahiko comes off as egotistical and condescending to those of lower classes even calling them trash. However, when threatened by the people he mocked, Yahiko becomes very scared as shown when he was grabbed by Ken Sudō for his insults.

Yahiko is also compliant and loyal as shown when he did not try to argue with Kōhei Katsuragi after he reprimanded him for his actions and as he was getting lectured by Kōhei on why keeping quiet is extremely important on the island's test.

Plot
Yahiko is first seen on the cruise where he mocks students from Class D by calling them trash for the unrefined manners. He is then grabbed by Ken Sudō who threatens him for his mocking words as Yahiko becomes scared but the confrontation is ended by Kōhei who reprimands his for his actions warning about the consequence of what could occur. Heeding his advice, Yahiko ceases his actions and does not try to insult the class D students again.