Looks like Marisa didn't realize that THEY'RE the reason why Reimu has no coffee.
Or she does but decided there isn't any point in getting violent over it until absolutely necessary.
Yuyuko!I'm beggin' you! Share your M〇x Coffee with me!Hawaaaa!LooooooomSwaaayTwitchIf It's for Reimu, Then...Ker-bow!Kirisame Marisa...she who once instilled terror in countless youkai, is...Shff Shff