A
character from a fictional video game or
book, who does not directly and vocally interacts with others. They still talk, only, we cannot HEAR/READ what they say, but other characters do. Sometimes, you can actually read or hear their thoughts. While silently interacting, they
move their body, such as nodding, or bowing their heads.
Isaac from Golden
Sun, Crono from Chrono Trigger, Serge from Chrono
Cross,
Ryu from Breath of Fire 1/2/3/4, etc.