I'm tentatively interested, since I have a character for a 3.5 campaign that never started but I'm itching to play, got to see if I can translate it to 5E though. It was some sort of homebrew summoner class, so I'm thinking of probably using this [url=https://www.dandwiki.com/wiki/Summoner,_Variant_(5e_Class)]this 5E summoner homebrew[/url] 

So the character concept was that she was a worshipper of the Spirit of the Past since the campaign was supposed to took place in Eberron, instead of planar creature just for flavour the eidolon was an ancient hero of sorts. (Since you mentioned anime, it's basically heroic spirit from Fate but nowhere as OP).

Do you think this is something that would work for your game?