I actually think these two would do the job well. Sure Mokō was a noble girl, but she also wandered for a very long time before settling in Gensōkyō. No doubt she's picked up (and barely recall) a lot of things.

Likewise, if we go by myth, Kaguya lived with the bamboo cutter for quite some time. She's definitely done chores and stuff. And even after Eirin joins her, it's still just the two of them in exile until they made the deal with Tewi.