Backstory:

She always has a smile on her face and rarely takes anything seriously.

She is also known as Annoying Cat.

Loves to prank others and be annoying to see their reactions.

Likes to walk around Deep Imagination looking for new adventures and new people to prank.

Is very close to the Purple Queen, as well as being friends with Chunny and Bugora.

Also likes to cheat to be more annoying.

Katie's battle is a survival battle that gets longer with every kill you get.

Final boss of genocide route.

Encounter Text:

[Pacifist/neutral (1)]

K: Hey, hey, hey!
K: It is April, fool!
K: Nah, not really.
K: Anyway, name's Katie.
K: Katie the Annoying Cat.
K: I'm going to Purple Kingdom now, until later.

[Pacifist/neutral (2+)]

K: Hey, hey, hey!
K: You are back, want more fun?
K: Can't really blame you.
K: Anyway, name's...
K: Actually you already know.
K: Bye friend.

[Genocide Route (1)]

K: Hey.
K: Purpura seemed to be really mad at you back there.
K: So you must be the worst people ever.
K: No really, I tried making her mad a lot, and nothing.
K: I don't know what you did to...
K: Actually I know, you killed everyone.
K: Just so you know, everything is enough for a punishment.
K: Katie out.

[Genocide Route (2+)]

K: Didn't liked your last ending?
K: Weird, you seem to wanting to do it again.
K: I guess I really won't understand you.
K: Well, I will be going.

Pre Battle Text:

[Pacifist] {No Battle, but still here is the text}

K: And here you are.
K: I must say, you broke the Punishment Hall.
K: No one ever came here and got out without a punishment.
K: So congrats, Rio.
K: Move on.

[Neutral]

K: And here you are.
K: Welcome to the Punishment Hall.
K: You killed some people, so you need to be punished.
K: Prepare yourself, Rio.
K: I will show you why I'm called annoying cat.

[Genocide Route (1)]

K: Welcome to the Punishment Hall.
K: Had fun?
K: Heh, I'm just trying to be positive here.
K: But don't worry, Rio.
K: I will make you rage quit.

[Genocide Route (2+)]

K: Punishment time...
K: Let's just get to the point.

Since you can't check Katie during battle I added encounter and pre battle text, you are welcome.