Generally, Japanese local mascot characters, known as Yuru-chara (ゆるキャラ laid-back character?) or gotōchi-chara (ご当地キャラ local character), move slowly and do not speak. Instead, they are usually accompanied by an attendant who speaks for them. Funassyi, however, always speaks for itself. It also often shrieks, jumps, dances and makes violent movements like headbanging. When it speaks, it usually ends its sentences with "nassyi" (~なっしー ~nasshī?) which sounds like the Japanese word for "pear" (梨 nashi?).
The number 274 appears in a lot of Funassyi's material (e.g. as the number of siblings, on license plates, as a house number, as a team jersey number). Under the rules of Japanese number puns, one possible reading of this number is "fu-na-shi".