Tiny Key

"'Hehe, wow! Where are my manners? My name's Tiny Key.' - Tiny Key, The Key to Victory"Tiny Key is a temporary host that appeared in "The Key to Victory". They suddenly appeared from End Key's keyboard and asked everyone to join his show

Appearance
Tiny Key appears to be a gra(e)y key that is tiny and exists out of spite

Trivia
They happen to be the "U" key on End Key's keyboard.