Well yeah, kind of
I went into the fight followed by 2 natives and the Tamed Boss, I didn't know I was about to battle "Him"
I genuinely thought I was just gonna escape the island and that the Demon Lord was the final boss, so...
A lucky mistake on my part tho
They kept hitting him while I was dodging or healing, sometimes tanking the bullets when I couldn't dodge in time and all that
His teleports and fast firing made the fight kinda chaotic, and if it weren't for the random trees in the way, I wouldn't have managed to get close to him or heal