From Pinterest: What do you two love about each other?

Shadow: Define Perfect...Sonic is the only one that makes me happy...and no one besides Maria and Rouge could see the side of me that wasn't a freak of nature

Sonic: Shadow saw me for me...and not just a hero...Tails and Tailsko Saw that I was more than a hero...I was like an older brother to them....and Shadow saw me as a lover and a friend