"When the pin is pulled (in this case pushed) Mr. Grenade is not our friend"
I am disappointed by the lack of Sinon present grenade images.
As a side note, is her name Sinon as the anime spells it or Shinon as the danbooru tag has it? Or is this some weird translation quirk like how Jose's name in Gunslinger Girl was Guisseppe or something ridiculous like that.