Scrimble Bimble

Toe beans

And nothing highlights this more than the way the game handles quests - it requires two people to say yes before you can hunt a monster. You (implicitly: if you dont take down the monster its pretty blatant you didnt sign off on it dying) and Alma, your Handler, who is the one acting on behalf of the guild to give you authorization to hunt a monster.

You're given special permission to use a weapon and to be a Hunter at all, and it will have been ensured that you will do right by the natural world, but you cannot unilaterally decide to hunt a monster, at least in canon quests. You have to have Alma sign off on it too. Every time, she has given you permission on behalf of the Guild, so that when questioned, you can both individually attest to the necessity of disturbing an ecosystem the Guild was not a part of until very recently.

Demonstrating the rope dart (繩標; sheng2biao1)

(source)

So you can convey this with any emoji of similar color and shape. You could also indicate an excess of bile by showing liquid seeping out of the spleen, and of course melancholy is already covered by existing emoji, so to clearly communicate the message "I think you are depressed because your spleen has too much black bile" with existing emoji you should text your friend:

i was looking around the cage for my fourth rat until...