Too many lovable characters to choose, so it would be myself. I would hope that the adventure would be more unique than the usual usage for the MC like sword or saber, something not used a lot. Maybe on a more personally level, games have helped me become more better at socializing and made friends. So my persona in the new world would be someone who likes to spread happiness and make new friends as their main goal (kinda cliche.) Main artifacts or skills would be related to games. When fighting, perhaps a domain ability, artifact like a chess/go board, mirror, or a headset, etc. to create an alternate dimension where losing can affect the real world... sounds like the shadow realm 🤣