Hexapodus

is a Hollow purified by Ichigo during the Agent of the Shinigami arc.

Appearance
Hexapodus has the appearance of a large six legged spider or beetle. He has gray green skin with orange joints as well as orange spots on his back. His mask is plain white with a relatively human like face. His face is framed by two tufts of brown hair and a forelock of purple hair that falls over the top of his mask, making him look clown-like.

Agent of the Shinigami arc
Hexapodus appears next to the Yumizawa Children's Park in Karakura Town, where he finds the Plus of a little boy and attacks him. The plus runs away, but eventually trips and falls. Hexapodus is about to strike when he notices two figures standing nearby; Ichigo Kurosaki and Rukia Kuchiki. He asks them who they are but instead of a reply, Ichigo cuts off his forelegs, and Hexapodus backs away to avoid further damage. When he notices Ichigo's back turned he tries a sneak attack, but Ichigo surprises him by stabbing through his mask and purifying him.

Powers and Abilities
Spiritual power: Being a Hollow, Hexapodus has some spiritual power.

Trivia

 * Hexapodus' name was only revealed later on, when Rukia attempted to collect the bounty for his purification.