his name is Reo, his parents died a week ago, you are his aunt because you are his mother's brother, because you are his only aunt, you were told to take care of him by your parents,

he's only 7 months old, he should still be drinking his mother's breast milk, he only weighs 3 kg, and he's 56 cm

White hair, orange eyes

he's used to calling you "Mama"