Sharkguard raises an invisible eyebrow as he sees the spiders coming from the door only labeled 503. He can guess that this room is a normally unused room. The fourth sublevel is pretty much empty so it wouldn't be surprising if the fifth is normally not used either. Sharkguard does have quite a bit to ask King when he gets this problem over with; since everyone is a victim here however it's not really something the shark-man would pressure for.

...At least all of them are victims except for the voice behind the door. The soft, sultry voice that someone down here would not normally make unless they have control of what's happening.

Sharkguard's eyes narrow a bit as he hears the voice. It's one thing when he breaks into a dangerous place uninvited, it's another when the person in the place invites him. The ahark-man could try something unexpected like smash through the wall next to him but it is probably for the best to try and get this resolved without need of force. Sharkguard puts on his best friendly superhero look as he confidently enter the room where whoever is in there is expecting him.