Thanks for the chapter!
Seems a thousand years or so of peace has weakened everybody due to only training with little field use and improper passing of knowledge like MC's name. Not only is he OP but he's like a lvl 500-999 while everyone else is around lvl 10. Be interesting if teacher takes an interest in him due to his superior knowledge about magic. If she has any sense she'd pick his brains on proper use of magic and forgotten spells.
Haven't read ahead but guessing Misha is like the magic equivalent of either a clone or test tube baby using Sasha's blood as source material or to create blueprint to design and make up Misha's body. Considering age and class is same as Sasha, Sasha's statement of claiming everything Misha has along with Misha being a doll, I'd say Misha is a magically created clone intended as a sister and playmate of Sasha hence being of the same blood. Too little info to determine Sasha's personality but could be jealous that Misha not only has her looks but isn't troubled by the Eyes of Ruin. As MC said Sasha can't control her Eyes of Ruin properly so it's likely her eyes got her into trouble or feels guilt from unintended excess damage. Like might have been angry with guy who commented for some reason and upset lost control of eyes which ko'ed him for a year. In any case, while Sasha talks badly about Misha if she really thought Misha was a souless doll she wouldn't talk to her like a person but ignore her existence or just issue orders. Also, Sasha wouldn't care about Misha if it was one sided abuse or not be sure of relationship if it was all bad. Hopefully find out more once MC wins battle.
Speaking of which, considering Sasha has about thirty people doesn't that mean she's the leader of the whole class other than MC and Misha? Why aren't there other leaders and groups? Also, what is Misha doing and how has the support magic strengthened her?