Curate, connect, and discover
is sonic mute in the portal au?
Actually yes! Maybe I'll change info soon,but this is how I see:
He loses his voice to portal 2 timeline, mostly thanks to lack of health care left for most of test subjects. The G.U.N research facility got no one to look after(especially after fight with Shadow where he gets destroyed) , so most tests subjects just don't survive huge amount of time passing. Sonic got a little help in timeline of portal 1 to just survive, but after that when he still in the facility, most of the healthcare features after huge amount of time are just out of order. His vocal cords is too weak to speak