I've yet to find an S Youmu. I have two, and they started as B. Today, a found a couple of A Youmus. With Softalk, you can really here her "myonmyonmyon" speech.
I finally found a Sakuya-a B. Like the Youmus, I tried to upgrade it by taking her accessory and putting them in with S-class. I think Bluesnow has made it harder to reform a yukkuri, possibly so you concentrate on breeding superior yus. She and a Youmu got each other pregnant. They gave birth to one regular Sakuya, and a Sakuya with Youmu's bow-both B-class.
Venny said: I didn't know you could "train up" their classes. How does that work? I take it s-classes don't beat up accessory-less yukkuri.
S and A-class don't beat up those without accessories, but comfort them. Then, the lower-ranked yus go up a grade, at which point I'd give them back their accessory. It's talked about in the thread in the Forum.
I've noticed that in 1.5.4, it's not as quick or sure to raise stats as in 1.5.3. Seems there's not as many wild S-class, either.
What seems to be the key element when upgrading a yukkuri is how much stress is put on them, plus how old they are, and also an unseen random factor.
In experiments, I found that older ones get more "set in their ways", so to speak. They're harder to raise in rank. I also found that, generally, taking their accessory and then leaving them in the company of one or two B-rank yukkuri works best, because they'll brutalize the hatless yu, but will seldom kill it. On the opposite side, keeping them with A-rank and S-rank yus calms them down, and this seems to slow their progress.
When kept alone, a hatless yukkuri will complain at first, but eventually will get used to being hatless. You don't want them to start feeling comfortable with hatlessness, though, because it makes it harder to raise their rank. Whenever they stop crying, it's best to briefly put their accessory back on them before taking it away again, thus starting the suffering anew.
mad_hatter said: S and A-class don't beat up those without accessories, but comfort them. Then, the lower-ranked yus go up a grade, at which point I'd give them back their accessory. It's talked about in the thread in the Forum.
I've noticed that in 1.5.4, it's not as quick or sure to raise stats as in 1.5.3. Seems there's not as many wild S-class, either.
Sweet. I had no idea. I wonder what other means there are (if any) of ranking up yukkuri!
I don't think even a lot of individual interaction will raise their rank. That said, I've had two infinity Marisa I've raised from B to S-class. One was a kotamarisa. I repeatedly healed and beat the hell out of her and she went up. A regular infinty Marisa would only go up to A, so I left her with that S kotamarisa, and she went up to S on her own. *shrug*.
That brings up something. If abyusing them helps them raise levels, has anybody seen where spoiling them made them drop rank? I haven't tried to, and I think Bluesnow leans more yuphile, anyway.
A couple of other things I've noticed is Patchouli die when they become Large. And that makes sense in Patche being overall weaker, so they don't live as long to become Infinity-size. The other thing is I have a Youmu with a Reimu ribbon that produces nano yu. Really, I guess they'd be house yu, but I went off the micro description.