'Those are your horns...?'

Sonic stares at the horns for a moment when he looks at Lucy's face, seeing that she's being badly treated differently by others without knowing the reason why & he never wanted to treat anyone so badly when they're different, remembering the time when he thought of Tails' time of being treated badly by others.

Sonic: Aww, come on. I don't care what you look like with those horns, Luc. I think they're way past cool.