Since they do possess bodies to exist in the mortal world (loosely remember what Minfilia said), I wouldn't be surprised if Lahabrea would jump back and forth between bodies depending on when he was needed. Whichever host was closer depending on what what he wanted do. For example, when he needed to go to Titan's lair, or wanted to hitch a ride on a Juggernaut.

I guess the clothes don't go with him though. Imagine waking up with a hangover after being possessed and you're stuck in evil looking robes and a sore throat.

Welp, I've been up too long, time to sleep.