Here's to hoping I do this right. *easily confused today 8D;;*
Eastern media
Kamen Rider Den-O, Yuuto/Ryoutarou, no time Kamen Rider Den-O, Deneb/Yuuto, master/servant game Kamen Rider Den-O, Ryuutaros/Urataros, I can't hear your lies
RPS (I'm being a bad little poof this battle...)
RPF (Japanese actor) (is it okay if I specifically, well, specify that?), Nakamura Yuuichi/Satou Takeru, behind the scenes
Video games
.hack//G.U., Haseo/Endrance, it was this way from the start Ar tonelico ~Sekai no Owari de Utai Tsuzukeru Shoujo~, Ayatane/Lyner, strange friendship Ar tonelico ~Sekai no Owari de Utai Tsuzukeru Shoujo~, Mir/Shurelia, you can never control me Ar tonelico ~Sekai ni Hibiku Shoujo-tachi no Metafalica~, Ayatane/Chroah, you're just like someone I used to know Final Fantasy VIII, Laguna/Squall, you're a moron Phantasy Star Universe, Hyuga/Ethan, we've both lost so much Star Ocean: Till the End of Time, Albel/Fayt, split ends
Crossover
Final Fantasy X/Final Fantasy X-2, Shuyin/Tidus, similarities