All right, here they are:
Naruto: Rock Lee/ Bleach: Byakuya/ Slayers: Zelgadiss/ Digimon: Gatomon & Kari/ Dragonball Z: Vegeta/ Hellsing: Alucard/ Pokemon: Blaziken & Nando/ Yu-Gi-Oh!: Both the good and evil Bakura/ Inuyasha: Miroku.
Huh wierd Oo Only thing I can think of is maybe the browser doing it as I know it randomly logs me out at times when I click a PM/report link. Have you double checked it did log out before switching the computer off? By that I mean another window/tab?