Hmmmm...
1. I'm sure there has to be more to those monsters than just emotions left on discarded items going awry. Especially if Skypeople are the same as we saw in ch. 1 - they didn't seem very attached to those items, to even leave any emotions of them. Unless, of course, it's emotions like disappointment, disgust etc. when they discard broken toy or something they're bored with.
2. "Taste of my love stick" is absolutely DIABOLICAL, oh my...
3. Engine being full of shit, crafty, a bit shady, but also experienced and strong is exactly the type of character I enjoy seeing, guiding protagonists through new environments. In person though? I would've hated him with passion, most probably xD
4. We might be getting into "you're just new here, no way you're meeting the boss this early" phase of many RPG-s. They're probably going to make Rudo do some chores, learn the ropes, build up a bit of trust, before he can meet anybody truly important. It makes sense, so I don't mind it - it IS a plot device though. What isn't, on the other hand.
5. Stick-lover is the same one Engine's been talking to, as it seems, so a fellow-senpai for Rudo. There's something nostalgic about small misunderstandings introducing characters to each other. It feels so "prologue", so "coming back home from elementary school", so "I've found my new hobby". Makes me feel warmer.