(Gil is one of those animal things that turn into a ferocious animal thing right?)
ok...
lets see... im thinkin of this on a split second.
since its Thornopsis, why don't we have this be set, in his land, the thorn forest or w/e it was Gil and his friend originally encountered the guy.
and lets say Maltest was being chased by them into there, and they finally caught up with him.
main character: Maltest, you Won't get out of here alive.
Maltest: oh, but (insert name) I do believe i will.
Gil(who already is slightly in a rage, due to being in the place where his friend died, also, while chasing Maltest, perhaps having him have flashbacks, and getting more into a rage might be fuel for his attack on Thornopsis, which allows Maltest to escape): YOU!
Gil would then go into his altered state, and charge at Maltest, only to be knocked back by Maltest, easily.
Gil: grrrrrr
main character: Gil, calm down, he's just trying to get you to be reckless!
Gil: I DONT CARE!
Gil attempts to attack, but is stopped by the main character, who can abrely restrain him.
Maltest: so (main character) you can't keep your pet under control? a very bad master, I must say.
Main character: GIL ISNT MY PET!
Gil(at the same time): (main character) IS NOT MY MASTER!
Maltest: really? is it not true (main character) that you enslave animals like Gil in your world? make them do sometimes meaningless chores, and use them as a form of entertainment? is it true you don't even consider them sentient? HA!
main character: GIL IS NOT AN ANIMAL!
Gil(who, if the topic had come up before, forgot about it in his rage): YOU ENSLAVE MY KIND IN YOUR WORLD?!
Gil, blinded by rage, and inable to control himself, knocks the main character off him, and goes to attack him, only to be stopped by other members of the party, who plead with him to calm down, or if there are no others, is blocked by the main character, who blocks Gils attack with his weapon, which you see right after a flash of white.
Maltest laughs hysterically, then says: Oh Dear, two friends, turned on eachother in blind rage, anyway, I really should be going, got stuff to do, people to kill, hey Gil, is (insert someone close to Gil) alright?
Maltest then Laughs, as Gil, attacks Maltest, assisted by the main character.
a light blinds them before they can reach Maltest.
Maltest: tsk tsk tsk, well, if you are itching for a fight that much, here, this guy should prove to be enough of a fight for you.
Gil: GET BA-
Maltest summons Thornopsis
Gil: THORNOPSIS!
Gil attacks, and i think you have the rest planned out.