Glutton Monkey Rewards?

Idk if it should be added because I'm not sure if the Glutton monkey is permanent. But on the Hot Spring page, they added some of the rewards such as the Dungeon pass boxes. Anyway, I just got a Flute of Despair from feeding the Glutton Monkey a loved food so could someone mention that somewhere? If I get any other instruments I will mention them.

Glutton monkeys will be here afterwards (or you'd be able to feed the normal monkeys)

And thank you for the updates to their food. Got a related question- I had thought that you got a Relay Treasure Chest once daily from feeding them, but I'm starting to see that I was wrong. (either that or I'm glitched), because I only got that chest once per character from feeding them, along with monkey fur or something. Perhaps it's a one time deal period, perhaps it's once a week.... anyone have anything to clear that question up?