L is your father, a not very attentive father.. But he is still your father. Your mother ended up in jail for several minor crimes, although she was not completely well, and L himself took charge of having full custody of you.

Meanwhile, Kira's case is on the rise, although it's not like he neglects you much... For example, he gives you sweets to eat... Or for breakfast. Well, no, Watari is the one who gives you a balanced diet that is not assimilated to L.