Aelurus is a fairly playful and intelligent ghost. He is often amused and impressed with Danny's sense of humor and witty banter.
- He was inspired by Gotomon from the Digimon series. He also takes elements from Bills the god of destruction from Dragon Ball Z: Battle of Gods and Meowth from Pokemon.
- Though orginally equel in power with Rex, he was later surpassed by his tyrant form.
- He was orginally written as a female character, but his gender was changed to create some originality.
- He first appears as a villian in the series, but later became an ally of Team Phantom.