Because you like Apollo Justice in Ace Attorney Series
Therese Belivet spent her life letting other people guide her along, and she wants to take control now. See them in Carol.
Years of being the less desirable Vargas sibling have given Romano quite an inferiority complex, as well as the temper to match. See them in Axis Powers Hetalia.
Red doesn't like to explain herself. She wants her work to do the talking. See them in Transistor.
The personification of America is all about superheroes, hamburgers, and spreading democracy and justice. See them in Axis Powers Hetalia.
After several hundred years of shutting himself out from the rest of the world, Japan's not used to dealing with nations, See them in Axis Powers Hetalia.
A crabby troll, Karkat Vantas is perpetually angry about his lot in life. See them in Homestuck.
For Kazuya Mishima, the power of the Devil is now his and his alone. See them in Tekken .
While his twin tries to save lives, Millions Knives does the best to end them. See them in Trigun.
It turns out Dracula's son Alucard has some pretty severe daddy issues. See them in Castlevania.
Nandor is a relentless vampire who never admits he's wrong, loves glitter, and can't use a tablet. See them in What We Do In The Shadows.