混血

混 = 昆 + 氵 : Helga Horse (hu) often visits entomology man (昆) in the encampment's bathroom ((e)n4), where he spends his time with (混) his ants which he keeps in a water bottle (氵).

血 = 丶 + 皿 : Mnemonic symbol: blood transfusion.

Xu Xian hurt himself and needs to get a blood transfusion in the elevator's bathroom. He found a petal leaf as donor, which is bleeding droplets into a bowl; Xu Xian gets the blood from the bowl as infusion using some tubes.