Suu

Suu is a Slime Girl that snuck into Kurusu's house without notice, looking for sources of water.

Appearance
She is a large mass of liquid slime and is transparent. She can transform into a more humanoid form which, according to Miia and Cera, is very rare for a slime to be able to do.

In her normal form, Suu is the size and build as Papi, but when she absorbs a certain amount of water her appearance matures to the point of looking like an adult: she becomes taller, bouncier, and curvier than usual. When dehydrated enough, she becomes small enough to fit into a small bucket.

In Chapter 9, she was given a rain-jacket to wear since anything else she wore instantly got wet.

Personality
Suu's method of learning is through mimicking the actions of others; such as Miia, Cera, and at times, Papi. She can be somewhat absent-minded at times; such not knowing that she almost drowned Kurusu and Miia by hugging them, and accidentally adsorbing many objects around the house. She also seems to be very child-like, as shown when she was playing video games with Papi.

Skills and Traits
Sine Suu is made entirely of a liquid-like substance, she is immune to most physical damage, she has the ability to change/manipulate her size and cling to the ceiling. When she absorbs more water she can shoot it out from certain part's of her body like a hose. Suu also seems to be a fast learner, having learned to talk in few days.

Suu becomes "diluted" when she's submerged in a large body of water, and it takes time for her to reform and drag herself out of it. However if she falls into a huge enough body of water like a river, the dilution effect would be serious enough to kill her.

Plot
Suu first appeared in a pot while Kurusu was teaching Miia how to cook. The slime latched onto her face and knocked her out before darting into a crack. After Cera tells him what it was, Kurusu goes to wet a cloth for Miia's head; only for the slime to pop out of the small bucket he was using. Cera tried to strike at it with her sword; with no success. Suu then rushed them and left; leaving them both covered in her slime.

Suu later watched Cera and Kurusu as they washed each-other in the shower, and later she snuck into the shower, both Cera and Kurusu panicked and Cera ended up getting knocked out. Suu then wrapped up Kurusu and revealed her humanoid form, much to his shock, she then began to hug and wash him, mimicking the actions of the other girls while using her body to rinse him.

But then Suu accidentally absorbed his head into her body, almost drowning him, but Kurusu dived into the water to get her off. Later, after she reformed back to her normal form, Kurusu, Miia, and Cera debated on what to do with her while she played video games with Papi in the background.

Trivia

 * She is the only girl not to be brought to Kurusu by Ms.Smith.
 * She is the only character who did not have a name, but rather one was given to her by Papi.
 * Like the other girls, her name derived from her species name: Suu from Slime.