Sonic spotted Shadow outside of the village one day. Curious, he decided to follow him to see what is up with the dark hedgehog. After finding out the reason why Shadow likes being alone in that one particular cave, he decided to stick around and company him. It makes Sonic realize that Shadow isn't really that evil and it also makes him grow closer to the dark hedgehog. SFW book.

An experiment, an extremely hostile one. Created to fight in wars and kill all enemies at given orders. Shadow was created for the "Benifet of Man kind" but using a mobian form to create the Ultamite Life form. He remained secret from the public, attacking anyone who entered his cell. That was until a ble hedgehog crashed into it during a battle. Shadow having never seen another hedgehog before, has an unexpected reaction. He escapes, mearly from the presence of the blue hedgie. His reasoning unknown to anyone but him. Lemons ? Sonic uke