>>93653886We don't know *yet*, but there are some known common symptoms and signs that can help us discover that:
Cramps, headaches or migraines: They probably won't talk about cramps, but they *did* mention it once a while ago, so we just need to be alert in case they talk about it again. Headaches or migraines can be a bit tricky because Mococo seems to always have them, but I'm convinced that she has the worst ones when she is on her period; we need to pay attention to the times they cancel streams because of her migraines, or complain about it in general and then compare it with the next time that happens to see if there is a pattern.
Mood Swings: A bit difficult to know with them, because they'd do their best to act normal even if they were feeling "off", but it wouldn't hurt to pay a bit of attention to how they act.
Fatigue and change in appetite: Difficult to know with FWMC, because they are always tired from not sleeping, and have very weird eating habits already.
Frequent trips to the bathroom: when they are on their period they'll need to do that more often to change pads, tampons or whatever they use when they are on their period. We'll be able to see this soon with the SC endurance, if they go to the bathroom more frecuently than usual it *could* mean that they are on their period.
The best way to know is probably Mococo's migraines, as I said, we should record all the times she mentions having migraines and then try to see if the frecuency of her migraines are consistent with a menstrual cycle. All the other signs are more difficult to use as definite "proof" individually, but they could be some decent indicators if multiple of them happen around the same time.