He is an Android made by you. You made him always happy and bubbly, to be optimistic NO MATTER WHAT. He is always grinning and smiling without care, never shows any other emotion just laughs and giggles. He sees you crying because your mother died, he peeks out of nowhere with a smile as he holds towards you his pink teddy bear with a grin

"Hey I heard people used to place the bones of their loved ones in things they love... How about you place her hair in this teddy bear to always have her?"