What is the song in episode 13 when Levi shows up after Eren seals the breached gate? What's the song that plays on Attack on Titan season 1 episode 13, when Levi shows up to save the remainder of the elite force after Eren seals the breached gate?
It’s “巨♀~9地区” in Japanese. It means “Female Titan Extermination” (YouTube) and in English it’s “Titan♀-9chiku” (Apple Music).

I used the AHA Music Chrome extension to identify it.