Sonic: seems like Felix is apart of our group and he seems like he didn't speak much

Shadow: his voice crack,

Tails: maybe he's mute?

Rouge: or deaf?

Cream: or just his muteness got worse

Amy: or he can't speak

Knuckles: or maybe like that

Sliver: Alright!! But I didn't know he could be mute or deaf

Blaze: or both?