Yes, that's mangekyou sharingan
Rereading after it's been updated some more and I totally agree with my past self lol
🤣🤣🤣🤣🤣
I guess this guy just hasn't had the opportunity to realize how dangerous the monsters can be, yet, because the mansion deliberately made them underestimate it by sending only the weaker ones when those 3 guys were still together, while only sending the stronger monsters after them when attacking each of them separately, from the shadows...