Note: If the reason for the alias is either stated as possibly/probably or unknown please forgive me and either tell me the reason and I'll put it in or add it in yourself. Also if you create a new character without an alias registred on here could you please add it in. Thank You!
An alias (エイリアス, Eiriasu) is a nickname given to a person, which usually comes from the thing which leaves the biggest impact about them such as the things tthey have done/achieved, their physical traits, personality or abilities. Code Names are also included in this list.