Aqua

The Seven Colored Flowers
Seth
Seth and Aqua are often seen together, with Seth being the brains behind their encounters. Seth can get annoyed with her at times, but they do seem to care for each other.

Yellow
Green
Blue

The first battle can only be fought using Kris. Due to this, it is easier to spare Aqua than to fight her. All of the 5 ACTs presented as well as Fighting increase Aqua's mercy by 20%. Once it reaches 100%, Aqua will use an “Omega Attack” similar to the patience soul's attack in the Omega Flowey fight in Undertale. If you survive, the battle ends.

Knife Circle: Knives appear in random spots in a circular pattern and shoot out in all directions.
Knife Chain: Aqua waves two chains of knives up and down the Bullet Board.
Knife Fan: Aqua throws spinning knives at the Bullet Board. Once they stop spinning, they'll point towards the SOUL's current position and head towards it.
Omega Knife: At 100% MERCY, Aqua will attack with numerous knives that spin and travel diagonally around the screen in unison, reminiscent of Omega Flowey's cyan SOUL attack in Undertale.
Duck: A singular duck floats across the battle box. This attack appears during the second fight, when Seth tells Aqua to mix up her attacks. It only appears once, unless you get hit by the attack, in which case it will be repeated until you successfully avoid it.

Aqua is first encountered in the Glade, after Seth warns her not to let the Delta Warriors get hold of the Petal Feather. After Seth leaves, the heroes approach her, whom she greets happily. She assumes they want the feather, before asserting that she can't let them have it despite wanting to, believing that being human is not doing things you're not supposed to. Susie denies this, much to Aqua's joy. The group then gets her to agree to give them the feather if they play a game with her, and a battle between her and Kris begins.

Once the battle ends, Aqua rewards the Delta Warriors with the Petal Feather, and with bullet patterns to defeat in the first platforming segment. Later, on the cliffs, Aqua rejoins with Seth, and the two of them impede the Delta Warriors' progress through the area with bullet patterns. At the end of the cliffs, this culminates with a battle with the duo. Halfway through the battle, Aqua gets bored and leaves, and after a few turns, the battle ends, letting the heroes pass to the Flower Castle.

Aqua is very childish, preferring to play than doing what's told. She has apparent affinity for knives, as they're used in all of her attacks in battle, and appears to enjoy throwing them at people as well. She often looks to the other Seven Colored Flowers for guidance and is most commonly accompanied by Seth, who she takes orders from in battle. Alongside with her childish demeanor, she is very naive, and a little dim too, as she gets easily tricked by others.

Aqua has a small build. She has cyan skin and black hair, beneath which are one or three large red eyes depending on the situation (however, it can be assumed that she has three and she can change them).