DESCRIPTION
"Creeper", as Belinda calls it, is built like a halfling - small frame, wiry build - but that's where the resemblance ends. With no hair or genitalia, angular features, a tendency to walk around completely naked, and skin that varies between shades of brown and black, there isn't a person on the whole of Golarion that would mistake it for anything other than what it is: an outsider. Of course, the glowing symbol on its forehead is a dead giveaway, marking him as somebody's eidolon. In addition, Creeper's skin also tends to shift colors when it experiences strong emotion; red streaks appear when it gets angry or frustrated, blue when it has been chastised, green when it's happy.
For months after summoning Creeper for the first time, Belinda was embarassed by Creeper's nakedness, and would force it to wear clothes. However, when her mentor explained that it might eventually grow extra limbs that would make wearing clothes impossible, she gave up and forced herself to deal with the awkwardness. The nakedness is, in part, why she began calling it "Creeper"; the other part is a nod to its ability to sneak around virtually unnoticed, not to mention its uncanny abilities to discern even the smallest details of the world around it and to get past almost any lock.