Post a character who rarely talks/speaks atau not at all and uses alternative forms/methods of communications

Celty Sturluson ( durarara!! )

megumi yamamoto from special a!she doesn't speak saying that she wants to preserve her voice........but when she sings it is sooo high pitched that it creates a big havoc.........

Rinnouse Mitobe (Kuroko no basket)

he never ever spoke in this anime till now.....he he he h

Switch from sket dance due to a childhood trauma he never talks. He uses a computer to talk X3

Eucliwood Hellscythe from Kore wa Zombie Desu ka?
She doesn't talk because her power can make her every word spoken become reality. Instead she communicates to others oleh using note pad.

Mori

Yuki Nagato

Saya from Peacemaker Kurogane

Eucliwood Hellcythe (Ore wa zombie desu ka?) hardly ever speaks because she is so powerful that oleh saying a word she can kill anyone who hears it, so she writes what she wants to say in a notepad :)

Hakko (Canaan) rarely speaks because of her ability (her voice damages the brain) and therefore communicates with body language