Standard Introductions: "System engaged...confirmed. You might be pretty tough." (Standard Intro in Story Mode Versus)
"Looks like a showdown. Funny." (Versus screen in Story mode)
"You guys are so cool..." (Versus Screen in Story Mode if you're one of the characters she has a crush on)
"Die in the darkness!" (Versus screen in Kula Diamond's story mode)
"You guys are so cool." (Against Duke, or any of the other older guys she likes in their story mode)
"OK, Let's have some fun!" (Standard Intro in regular Versus Mode)
"Oh, fudge!" (said at the Continue Screen)*

Special Introductions:
"Huh? Did you say you wanted to test out my strength?"
"Ah. If that is what you wish, then you shall receive it." (Nagase & Jivatma)

"Sock it to me, Shiranui!" (Nagase & Mai)

"Enter Mignon Beart! What a freakshow!"
"Arrrgh, this girl makes me so mad!" (Nagase & Mignon)

"Go to hell."
"A Ninja's destiny is to die in the shadows."
"Here you go, Showdown!" (Nagase & Hanzo)

"You're just like me, a human weapon, huh?"
"Hmph! Why don't you keep your nightmares to yourself?!"(Kula & Nagase)

"Oh yeah, I bet you're thinking you're pretty hot with the ladies, am I right? Pretty boys like you don't know what it means to be a real man! I don't like kids because they don't understand." (Nagase & Alba, Soiree, K', Iori, Kyo, Terry, Rock, or Ryo)

"I—If I win, you gotta go out with me! C'mon, you got it. Take me out!" (Nagase & Duke, Seth, Maxima, Clark, Wild Wolf, Mr.Karate, or Richard Meyer)

"Oooh, you're scary. You're a regular fighting machine, huh? So are you really that tough?"
"Could be."
"But I do think I'm tougher than you!"(Nagase & Leona)

Win Poses:
"Man, you are totally weak!" (Standard Win Pose #1)
"Yeah, good fight!" (Win Pose #2)
"Working for a weak weenie like you would put a short in my system!" (Victory against Jivatma)
"How about you just give me your e-mail address, OK?" (After you beat Duke, Seth, Maxima, Clark, Wild Wolf, Mr.Karate, or Richard Meyer)

*"Kuso!" can mean a variety of things. Either way, it's bad. Personally I like to think she's being a pottymouth and saying "Oh, fuck!", but that's just Nero.