Shizuo... [Shikamaru has a good memory, and that extends to the events of that one experiment, back at the end of April. It's not a lot, but he can put a face to the name - and from there, pick out where he's seen him just in passing.]

The guy with that penguin suit? I think I've seen him going into the Good Spirits.

[But he doesn't remember hearing a warning about him now.] Do you think this Izaya guy is more dangerous to people here than he is? I mean, you called him the strongest of the two.