Cleon
Legend
I'm partial to the Magical Beast form, but I can see the appeal for it being a Behemoth Bear as well. And it's not unprecedented for it to be able to shift dimensions (given that several of the "Strangers" are classed as extradimensionals rather than extraterrestrials).
The only snag I can see is that it would infer the previously suggested boosting of intellect, which parts a bit from Ikuya; he's cunning, but not the brightest bulb in the box. He's more of a supernatural uber-predator than the animalian equivalent of a demon lord of archangel.
I don't see that as being a problem. A Behemoth Gorilla is Int 6, and it's already smarter than that!
The ability to shift dimensions does not require it to be supersmart either - there are plenty of examples of Extraplanar creatures with mediocre to low Ints that can do it (e.g. Ethereal Filchers, Ethereal Marauders and Phase Spiders, all of which have Int 7 like the current Ikuya).
I'll agree we're not aiming for a demon lord / archangel type creature - if I was I'd be piling on the SLAs!
