[So... not only was he wandering, but after seeing the kinds of dangers this place posed he decided it'd be a bright idea to split up. Way to go, Izumi.

Add doesn't know him that well, but he does know that he's a friend of Leo's. It doesn't seem like to much of a stretch to guess that Leo is the friend he's talking about. Well, at least it's not like that idiot is any more useful... but is it really a good idea to be leaving Leo on his own? That can't be what happened, right? He probably left that idiot with someone.]

Doesn't matter if you chose it or not, why the hell would you go off on your own if you can't defend yourself? At least with two idiots, you... [ok maybe now isn't the time to be making another human bait joke] tch, never mind. Consider yourself lucky to have run into me while I'm in a good mood! At least half of this place is built from my memories, so you couldn't ask for a better tour guide, kukuku.

[yeah, the flesh tunnels are his fault, sorry not sorry.]