That answer is much easier to field: vials of near-pure capsaicin isomers combined with volatile fire-aetherical compounds to create Weaponized Hot Sauce. A really, really bad idea to drink, but very handy to throw in the faces of anybody or anything that's trying to menace ya.

[She doesn't know what 'pneuma' is, but considering that already Hikaru is working on something close to, but not quite, what she knows, she files it away under 'aether-analogue'. Maybe if and/or when she runs into Hikaru again on the train, she can dig a little further. A meeting of the minds, mayhaps.]