I never heard the attacker being called "tori".
Where do you hear that?
When practicing with Endō Seishiro we very seldom have shite and aite. But mostly, allmost ever, tori and uke is used.
Sorry, Carsten, that was a mistake. I meant aite.
(As usual, mucking things up...my subconscious ongoing attempt at keeping myself humble
BTW, FWIW, at my school we use aite and tori a lot, but also uke and nage, so they've always seemed more or less like synonyms to me.