Context: Libatape is a brand of japanese Band-Aids.
Though why doesn't Miho know about it, but Saori does. Is it Miho's Kumamoto upbringing? Or perhaps is it that traditional households (e.g. Nishizumi) forgo the use of foreign brands, and only use Japanese brands for everything?
Also, Anzu doesn't seem to know anything about Libatape, so is it a small brand?
This comes from touhou 19, specifically Orins story mode I believe.
Orin has an ability that turns the fairies - the common fodder enemies of the game - on her side of the screen into Spirits, which are more damaging to the enemy when she destroys them. However, Zanmu's ability basically causes all of the spirits on your opponents side to, in technical terms, shit danmaku everywhere.
This means Zanmu is a HARD counter to Orin, as she turns orin's attacks against her.
Touhou 19 balance makes me want to laugh and bury my head in my hands at the same time.
Should note that this is a direct result of poor gameplay decisions. By using lvl2s and generally allowing the boss to create combos, the player is inadvertently getting their side of the screen obliterated. Just don't shoot (or shoot the boss carefully if you're feeling risky) and Zanmu's not too hard to beat as Orin.
Bonus point: Orin is no slouch in doing the same to Zanmu, either. On videos of high-level players it's actually not uncommon to see Orin and Zanmu trading entire screen's worth of danmaku against each other.