Menthol and Seltzer Cookie fusion!
With these two and fusion, Seltzer always found an excuse to avoid fusing with Menthol or had to prepare and focus really hard to not let him see her thoughts when they fused.
But her feelings couldn’t be kept secret forever. An accidental fusion happened one time when Seltzer was blushing to herself after Menthol walked by, but he bumped into her. In a flash of light, the two fused and Menthol was suddenly hit with a huge wave of a mix of Seltzer’s giddiness, affection, and mortification (mortified that Menthol is now directly experiencing her feelings and can hear her thoughts).
He was confused at first and tried to make sure she was okay while also managing being overwhelmed and bombarded by all these emotions. Finally, (it takes a good minute since he’s pretty dense/oblivious when it comes to this particular thing) it hit him: Seltzer likes him. Then HE immediately started blushing in addition to Seltzer and their fused form’s face turns bright red.
When they did unfuse, both stared at each other for a moment before bolt in opposite directions from the sheer panic and embarrassment.
They did have to eventually fuse again- especially during the events of the Premonition of Doom update with the Avatar of Destiny.
The two work well together when fused and get along well. At some point, they will work through Seltzer’s feelings. (But Menthol might like her back)