Abilities

Shapeshifting

Numeri can alter the shape of her body, though calling this a true shapeshifting power wouldn't exactly be accurate.

Although she can easily change the shape of her body, changing things like color or total body mass takes a lot longer (assuming she doesn't split off parts of her body to save for later).

She can also control her density to a certain degree, which can provide the illusion of growing/shrinking without altering her mass.

Seeing from everywhere

Numeri can see from every part of her body, all at once (including hair, arms, legs, tendrils, and even her boobs), making it virtually impossible to sneak up on her.

This means that she can see while her eyes are closed, and even while she's sleeping.

That said, her vision is far from perfect.
A human with her vision would need glasses.

Hard to kill

Contrary to popular belief, slimes can be very difficult to kill without proper knowledge.

Numeri's "heart" is the only part of her that can truly be considered her, her slime body is essentially just a puppet that she's controlling.

Under the right circumstances, she can even regenerate from just her heart, though this requires the help of another slime.

She also has a bunch of weaknesses that make killing her a lot easier (fire being the most prominent one), though she's honestly not much of a fighter in the first place.