I actually have no clue.
Genshin Impact is by far the game I've spent the most time on in my life, with 2500+ hours, but I've always been changing characters to play with. If we consider the protagonist, Lumine in my case, is the character I'm always playing with in the story and events, then it's she by a very long shot, but if we are considering the actual gameplay, I really have no clue.
If I spent 1 year with a character on my main exploration and combat team it's around 600 hours playing with it.
Maybe Bennett? Still is a support on some of my teams after all these years, even as he rarely is in my exploration team, which takes a lot of time, for a long time now. But its hard to say.
Hoshimi Miyabi from Zenless Zone Zero is in my farm team and in one of my 2 or 3 teams for all combat content modes, so easily more than 600 hours with her there as well.
The protagonist from Pokémon Violet, as I have 650 hours there, if we consider than he is the only managing the pokemon in the battles.
How many times have I played Pokémon Crystal tho? Who knows lol.
The character I've been playing with for the longest time, considering how young I was when I first played it and it still has games coming that I play, is Sonic the Hedgehog, but definitely not the most time spent playing with.








