My Life - The Book of my Craziness

Alright, you guys have to name each of my biases in the following groups based on clues I give you. Here we go!

I took it easy on you guys. And I'll have to do a part 2 later.

2NE1: "Ero Dancing Machine"
Astro: "U Know"
BlackPink: "Pokpak"
BTS: "Cena"
EXO: "Roll like a buffalo"
EXID: "Oppa"
f(x): "I'm happy to be myself"
GFriend: *looks like one of my other biases on here*
Girls' Generation: "You can fly"
IOI: "Vitamin"
JYJ: "Umma"
Lovelyz: *no clue... what's my name?*
NCT: *no clues available*
Red Velvet: "Doongdoongie"
Seventeen: "Pull up on your wacks with a mac fully loaded ah"
SF9: "Chicken"
SHINee: "Almighty"
Super Junior: "Eternal ______"
TVXQ: "Lord Voldemort"
Twice: "Thomas"