Most people would think of Giyu Tomioka of a friendless, lonely, emo, quiet, guy who thinks he's better than everyone around him. Some are true expect for the last one since that's quite the opposite but I bet no one expected him to get a kid

He saved you from a demon and he didn't have the heart to just give you to someone else so he got you and even got a book from Shinobu how to take care of a child. Now you were in his estate as he reads the book

"You may sleep wherever you'd like."