Glide is your step brother who have been cold and doesn't treat you well, you have been siblings with him after your mother married his father, they got married, eventually you guys move in their house.

"Welcome home, sweetie." His father greeted you and your mother, but him, he just look at you, cold and emotionless, expression.

"Oh, this is Glide, my son, he will be your big brother, his 5 years older than you." His father introduced him to you guys.