Marten is pretty much uninterested in romance or even in purely physical relationships. It nets him nothing, gets him no closer to his goals, and is only a momentary distraction that actively hinders his progress. That being said...
Physically:
Other than that, it doesn't matter to him. Though I have stated, in character, that the only person that could stand next to him would "have to be my equal in every way" (because I still can't get over Griffith and love to steal his lines), so it's safe to assume that unless you're at least a match for him, he isn't interested. Ideally, his partner would be better than he is.
Physically:
- Small people, here referring specifically to Lallafell, Miqo'te, and Au Ra women. He's more attracted to people bigger than him, especially physically imposing women, like Roegadyn or Highlanders.
- He doesn't like weak people - not referring to people who lack physical strength or martial skill and ability, but rather people who don't help themselves. People who lack the will or ability to struggle against circumstance.
Other than that, it doesn't matter to him. Though I have stated, in character, that the only person that could stand next to him would "have to be my equal in every way" (because I still can't get over Griffith and love to steal his lines), so it's safe to assume that unless you're at least a match for him, he isn't interested. Ideally, his partner would be better than he is.
Each man longs to pursue his dream. Each man is tortured by this dream, but the dream gives meaning to his life. Even if the dream ruins his life, man cannot allow himself to leave it behind. In this world, is man ever able to possess anything more solid, than a dream?
-Berserk
