User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-6050823-20130711170604/@comment-5398869-20130713003239

Maybe it's a parasitic relationship. Aruserutasu goes hunting and brings back sustenance, and in return the earwig thing provides defense for Aruserutasu (what we saw in the trailer, them 'combining') *shrug*

Just my thoughts, lol. I'm really interested in the relationship between the two so hopefully we learn more as September draws closer.