Rimuru Tempest is the main character from the manga and anime called That Time I Got Reincarnated as a Slime.
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MC Dies and meets god who allows him to reincarnate into a world of his choosing along with the powers of Rimuru Tempest.
The actual quirk will be that you become a blue slime ball about the size of a Basketball.
After awakening the your quirk you will also recieve the ability called Great Sage.
With the powers of the slime and great sage you will be able to absorb/eat villains and take their quirk (Kind of like all for one but they dont actually lose theirs.) after analysing the person and taking their quirk you can spit them out and hand them off to the police or you can keep them in you.
The MC will also be able to shapeshift into a human form.