Featured Character: Harpy
I've grown more attached to Harpy the longer I have had him. He's my 2nd FNaF fancharacter (I label all my characters as "OC's" for reasons, but he is a fancharacter), and he was created not long after Gipsy. I have a small cast of characters like him-- big, able, protective, serious. Jaeger, Ragnar, and Grover are to name a few... the difference between him and the others I have is Harpy doesn't mess around. Getting him to even crack a smile is a small miracle. He has more of a task-oriented mindset, and follows orders and completes them very well.
While Harpy does escort groups of kids around his workplace, he does what he does-- escorts. He is a mobile security unit, and like the other animatronics (equipped with advanced AI) he can recognize the face of a child predator. His job, alongside guiding kiddies through a maze and teaching them about preserving the environment, is to protect them. Harpy is perfectly capable of ousting a registered predator/offender without much resistance.