She says, "I am student council president Matsumoto Rise. Nice to meet you." Oh, and I'm science teacher Nishigaki Nana. I'm always looking for new explosion buddies....
What? You're lonely because the second years are away on their school trip? Don't worry, I'll stir up some ruckus for you....
No, I'll make some tea. It's not bad getting a change of pace from my experime---BOOOOM!
You'll bother everyone else, 
if I leave you alone.
Vas a molestar a todas, si te dejo ir sola.
Si te dejo por ahí sola, vas a estar molestando a la gente.
Você vai ficar enchendo o saco de 
todo mundo se eu te deixar sozinha.