What does "さ" means in 探偵さ? I watch an animation called Detective Conan, which is about a detective. I read translations, but try to listen in Japanese. Sometimes, when he is asked "who are you?", the main character answers by saying "" (or is it ""?). In this case, what does means? Thank you for your explanations.

This is similar to in meaning, but it is less assertive. Unlike , it attaches not only to nouns and the stem of na-adjectives but also to the dictionary form of verbs and i-adjectives.