If I were stranded on an island with an anime character, with my luck, it would be Alucard. Luckily, he could just whisk us off the island at any time. Ignoring that fact, I'm sure he'd have centuries worth of stories to share. Food wouldn't be a problem for the master hunter. He could see danger coming miles away, without an eyeglass or anything, and he could handle it with ease.
Plus...dangerous, seductive vampire....what more could you want...?
(Probably someone who wouldn't look at you like you're a big, juicy...snack...but, heh... fantasy...) ¯\_(ツ)_/¯