Yeah that's a rubber band, the anon mentions grabing one to use it to punish the reimu puffing.
Mwummy whear arshe you?
Hurry up and look ach cwute Reimyu okey?Grabbing a nearby rubber-band, I decided to punish the stupid one that was trying to 'intimidate' me.As soon as they opened their eyes they immediately started looking for their mother, so I told them "She's not here, you're never going to see her again understand?".
Upon hearing that;
Marisa burst into tears and started pissing herself,
Reimu didn't believe what I said and continued to look around herself restlessly,
and the last Reimu began to threaten and 'intimidate' me.