When Botis shows up, he looks like an ugly viper–as opposed to all those cutie vipers, I guess. If you don’t like that form, you can ask Botis to wear a human shape. It’s not much better, though. In human for, he has big teeth (sharp, I presume) and two horns. His favourite accessory is a sharp sword.
According to the Goetia, he “telleth all things Past, and to Come, and reconcileth Friends and Foes.”
In Hell, he’s both a President and an Earl.