Reksai is only listed as Fighter
And that got me thinking, Fighter is selfish and Tank is not.
Fighters provide things in fights that benefit mostly them while also benefitting other people just because they did them. Tanks provide things in fights that benefit others primarily.
Tanks like
are very selfless characters by design and playstyle for example

Yeah she has healing and damage but both are delayed She has one form of CC which is mostly selfish and aggressive She brings utility but only thru subtle ways (sonar) Her mobility is free form but limited, delayed and predictable
She is everything a Fighter is supposed to be
Even Renekton fits Fighter really well

Healing and damage but both are delayed in severity One form of real CC that is mostly selfish and aggressive Brings utility thru presence and a limited shred Mobility is somewhat limited and predictable
however really don't

Mobility is really selfish and the true vision is somewhat direct but subtle in utility Directly providing shields seems like a no no for a Fighter/Assassin to do Sustain through combat seems like something a Xin would do not a Lee The slow makes sense, he is about obnoxious mobility and chasing His Ultimate is a super defensive skill that he for some reason uses offensively and it provides so much for both him and his team that someone like a Tank/Fighter would rather have it than an Assassin
Other than his high amount of damage his kit seems pretty solid as a Tank one, which is his primary tag
I don't think any kind of Fighter should have Auras or Passive defensive stats unless they are Pure Tank like Rammus I think Jarvan with less damage on Q but longer armor shred, specifically tied to autos and nothing else, and an AS aura on his E instead of being passive at all would be good for a Tank/Fighter