Mark

Mark is the first son of Libra member K.K. and her husband Yukitoshi.

Personality
As shown, Mark is K.K. older son and he has a little brother named Cain who resembles their father but has a brash personality like their mother, while Mark himself resembles their mother and is more level-headed like their father. As shown, Mark is very responsible, even as a child, being more understanding of his parents and of how how his mother cannot always fulfill her promises to him or his little brother due to her job. As shown, Make also fulfills his older brother role very well and tries to stop his little brother’s tantrums and teach him to be more understanding of their mother. Due to being older, Mark has told K.K. not to get Cain's hopes high by making promises, knowing that her job often gets in the way and that while he may be used to it already, his little brother was not.