Mortal? Yes, but only for an item with the power of many soul remnants.

Power, he can create illusions of his fear regardless of the being he is using the power of illusions on. Can teleport, fly, cross dimensions with limitations. Even if temporarily destroyed (unless it is with the Item with remannants) it will come back if the Foxy who created it suffers.

He is considered a leader because he is more strategic and intelligent, and also imposes fear and security in command of the shadows group.