Needleman (Spikeman)

Needleman is a Dark Loid navi, and is operated by Mariko-sensei's evil twin sister, Yuriko Oozono. Needleman is the first navi to appear in the anime who was exclusively only in the EXE Transmission game for the GameCube.

Needleman's Japanese speech dialect is that of Yakuza, which is what gangsters are said to use (info credit to Cerulfox). This gives some good inclination as to just how ruthless this navi can be in a battle.

You will be happy to know that his anime counterpart has kept the "Sha sha sha sha sha!" ^_^
This character description was made for episodes that I have seen so far. It may be updated as more episodes become available.