manga medusa

Medusa’s Alibi

I’ve been reading the Soul Eater manga in preparation for writing fanfiction again, and came across this panel. 

I was under the impression that Soul Perception (and by extension sensing) was a meister ability, and yet Medusa mentions sensing the presence of witches while she’s undercover at DWMA. Maka seems to take this in stride, which makes me wonder if it’s possible for normal citizens to sense souls in Soul Eater’s world. Also, if Medusa was undercover as a school nurse who could sense souls without being a meister, why does she make it seem like she intentionally headed for the witches? Would her excuse be that she was planning on caring for those who might be injured by the witches? I doubt she would say she was planning on taking the witches on herself. Anyone have any theories on this? @souleaterwikia? Anybody?

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I really feel like Medusa and Marie are Stein’s bad and good sides. Marie represents stability for him and her motherly attitude towards the students is something that reflects on sane Stein in the manga. Medusa, however, holds his same sadistic attitude and tends to act blindly without worrying of consequences like madness Stein. And when stein completely fell off the deep end it was because he thought Marie was dead and fled to Medusa if i remember correctly. She also has his desire to learn at any cost. Personally, I prefer Stein x Marie.