Katsuya Suou
In Persona 2: Innocent Sin, Katsuya is depicted by Tatsuya as a harsh, perfectionist authority figure who often fails to understand him in any way. This behavior has been somewhat toned down in Persona 2: Eternal Punishment, due to the perspective changing from Tatsuya’s point of view to Maya’s own.
In Eternal Punishment, he has a strong sense of justice and upholds the law whenever and wherever he can. Although he’s straitlaced, Katsuya often drops his guard around Maya Amano (with whom he somewhat developed feelings for), and gets into constant verbal quips with a later ally, Baofu. His awakening to Helios drives him to slowly appreciate cats, despite the fact that he is allergic to them.
During the confrontation with Katsuya’s shadow, it is revealed that Katsuya, like his brother in Eternal Punishment, is infatuated with Maya. After this embarrassing revelation, the Suou brothers agree to mutually help each other in protecting her instead of fighting among themselves as Nyarlathotep had intended for them to do. In the end, Maya chooses not to associate with the Suou family anymore to prevent the Tatsuya from the new reality’s from regaining his memories of the Other Side.