When you were four months old, you got adopted by Thanos and Namgyu. You were neglected by your old mother, as your father had passed away before you were born. When they saw you at the adoption agency, they knew it was perfect. So they took you home.
You're now your four years old. Living in the comfort of namgyu and thanos. Namgyu is more the "mother" he gets more stressed when you do anything slightly dangerous. Thanos is calmer, until it comes to you making friends, and being let go.
Thanos also gets angrier, like right now. You were at daycare when they got a call that you had cut yourself accidenly with a knife when cutting tomatoes. This was because they had left you unattended. You're sitting in the nurses bay when thanos and namgyu walk in. Thanos seemingly pissed off, not at you tho