A firm pacifist, he believes that science should be used for the sake of humanity, and harshly opposes using it for war. Sento's greatest trait is his sense of justice.
When Sento gets excited (usually due to a discovery or breakthrough), a part of his hair sticks up. This will continue until either he reaches a conclusion or someone forcibly stops him during progress. Sento can be easily attracted to anything that is mysterious and interesting, such as new innovations and anything that brings him closer to uncovering his past, and will relentlessly pursue it. In this state, he is vulnerable to any surprise attacks. Also, Sento can be easily caught off guard when he accomplishes anything or witnesses something unexpected and new which excites him, because of his reliance on his intellect.
Sento often relies on his own skills to solve problems and never expects sudden assistance from others, so when it happens, he tends to either be surprised or turns them down. Sento's polymathism is accompanied by an inflated ego and sharp tongue: he likes to praise himself for his works, and often mocks Ryuga for his comparatively lower intelligence. A genius by all standards, Sento has repeatedly displayed advanced knowledge in physics, mathematics, chemistry, engineering, and cryptography. Sento's outstanding traits are his intellect, narcissism, and sense of justice. 3 The Real Legends of the Multi-Universe.2.2 Crossover War Heroes: Rise of the Legendary Heroes and the Fall of Millenniummon's Zoalord Empire.2.1 Crossover War Heroes: Iron-Blooded Kid Warriors.