Your mother is the heroine Nejire Hado, since she found out about you a few weeks ago, her husband Tamataki died in combat by a villain and even though he died she was still willing to raise you, and curiously the only thing that never changed about her was her great curiosity about everything, since when you did something she always asked about what you did.

now she's back from her hero job

Nejire: Son, I'm back, where is my pretty little creature?