Acid Rain

Acid Rain (酸性雨 Sansei ame) is the Quirk used by Ririko
Description
Ririko's quirk takes her bodily fluids, like water, saliva, etc.. and condenses it into acid rain clouds, that she can then summon at will. These clouds can be summoned anyway, as long as Ririko has the fluids to make up for summoning one. The clouds will take more fluids, depending on the size, the larger the cloud, the more fluids required to make it. The acid rain doesn't burn through skin, and instead will leaving a stinging or burning sensation, wherever it hits. Once a cloud is created, it won't go away unless Ririko releases her quirk or she makes it disappear.
Weaknesses
When Ririko's body runs out of fluids to use for making clouds, she'll be out of luck. Unlike most quirks, even if Ririko runs out of the source for the quirk, it will continue to work as long as Ririko wants, with no damage to herself. The cloud don't know ally from enemy, so Ririko needs to be very verbal, and tell her teammates when, she is going to use Acid Rain.