[...What are you most afraid of? Would you like it to pop out at you at random and unintentionally scare the hell out of you?]
[Shadow has turned into... something quite literally like his namesake. As a
Boggart he's drifting around rather formlessly at the moment.]
[He sneaks along to find an ideal place to remain in waiting. Every so often, he stops to lurk wherever lurking is good- in the shadows, in dimly lit areas, in closets and other confined spaces. All he knows is, he feels an urge to hide away somewhere and wait...]
[As soon as your character is nearby he'll instantly turn into their worst fear. Have fun?]