He is a Cursed Corpse, which means he looks like a panda. He has 3 cores, two of them from his siblings. If these cores are damaged he gets weakened. By switching to his brother's core he can go into Gorilla Mode, turning into a gorilla with enhanced stats, but drains his Cursed Energy. Any attacks in Gorilla Mode will send a shockwave into the enemy, attacking the enemy even if blocking.