This is my first time participating in a Secret Santa!
I don't really have any particular references, but here is a list of some of my favorite characters:
Levi Ackerman from Attack on Titan
Toshiro Hitsugaya, Rukia, Shinji from Bleach
Anyone from the Gaang from Avatar: The Last Airbender
Korra from The Legend of Korra
Naruto, Minato, Kushina, Temari, Tobirama, Kakashi, Darui, Shikamaru from Naruto
Luffy, Ace, Sabo, Zoro, Law from One Piece
Kirito from SAO
Eiji from Bakuman
Kyle from Psyren
... take your pick?