Also, YGO lore has the tendency to corrupt, maim or kill love interests, sometimes even multiple times.
nah they'll be fine and kept alive, this isn't another massive storyline like Duel Terminal or World Legacy
I wouldn't be be suprised if Labrynth, Adventure, G E N D E R and Runic all end up being in a shared universe (the last two already are), considering they're all very video game-y. Even without that, the lore of isolated archetypes can be cruel and often tragic (Kozmo, Visa's lore, Jigabyte's, Dog Marron's, etc.) too. I haven't caught up on the Sky Striker Manga yet, but you have to admit that Roze doesn't looks to healthy in Linkage...
Also I don't recall the Credits page being there upon my first read, but ... is there any reason Arias is referred to as a she?