Chi sei? in Italian is "Who are you?" in English.
The way to say "who are you?" in Italian is "chi sei?"
Sei bravo! in Italian means "You're good" in English.
Sei bella! in Italian means "You're beautiful!" in English.
"Six" in English is sei in Italian.
sei li?
Tigrotta sei! in Italian means "You're a little tiger!" in English.
Perché sei arrabbiato? in Italian means "Why are you angry?" in English.
"Are you safe?" in English is Sei salvo? in Italian.
"You are horny!" in English is Sei arrapato! in Italian.
"You are special!" in English is Sei speciale! in Italian.
"Me indeed, but who are you?" is a literal English equivalent of the Italian phrase Io bene, ma chi sei? The pronunciation of the interrogative in the second person informal singular of the present indicative will be "EE-o BEH-ney ma kee seh-ee" in Italian.
"You're in charge!" in English is Sei in carica! or Sei responsabile per...! in Italian.