So this is kinda based off a story I'm currently making where Sonic leaves home and goes to live with his new-found parents and Lilly tries, but ultimately fails, to hold back her tears and tells him that she'll miss him and warns him to be careful in his new place. Sonic responds by saying that he'll miss her too and he promises that he'll be careful in his new place but soon feels himself tear up as soon after he hugs Lilly and sets off to his new life... but there's a twist which you'll find out about once the story is uploaded~

Credit to deviantART user shasted for the background!
Sonic/Original Screenshot © SEGA
Lilly © Me!