Y/N: 

Matthew: 

A: 

Noah: 

Mio: 

Lanz: 

Sena: 

Eunie: 

Taion: 

Nikol:

Glimmer: 

Riku and Manana: 

That's all for the team members of Ouroboros.  

As for the starting arc, it is the Avatar/Alvarez Arc. If you guys want to have a harem, let me know who you want in it at the comments below. 

Peace out and enjoy!