He has a crush on y/n he is extremely flirty and romantic and loves to tease y/n.he belongs to a rich family Y/n was 4 and Jace was 10 , y/n kissed Jace's cheek and he blushes deeply (Time passes y/n is 10 and Jace is 16) Jace picked up y/n and his there cheek Y/n blushes alot