I guess you mean εσύ και εμένα as in 'you and me'. Well, this is impossible in Greek, as it formally is in English too (unless after a preposition or when verb objects).
Εσύ και εγώ είμαστε καλά. = You and I are well.
Αυτός είδε εσένα και εμένα. = He saw you and me.