Not sure that Seabreeze has a profile search function. You should be able to view someone's profile by clicking on their name on their forum post etc, but I didn't think there is a way to "look up" their profile. Which means if they haven't posted recently, you're pretty much dang outta luck.
This is now someone's cue to jump in and say "oh no, look, you just click here and here and type in their name."
edit: you can look up a name, if you know they've made forum posts recently using the normal search function, but Seabreeze doesn't hang onto "recent forum posts" data forever.
