She was still mulling over what would be suitable decorations when the professor made his rounds and quietly pointed out her error. "...oh..." Mitsuki replied quietly as she set her knife down on the table and reached for her wand to cast a quick cleaning charm upon it. She wasn't embarrassed as much as she was disappointed in that she had used her time and energy inefficiently even though her green tea leaves had cautioned her against such tresspassings. The Ravenclaw pushed the cucumber aside and observed Mercer a bit as he dropped his cucumber multiple times and then carved more than his cucumber. But, in true Mercer fashion, he made the best of the situation - something Gherkin would surely appreciation.
Her wand still out from cleaning her knife, Mitsuki reached for her (boy space)friend's hand and performed a swift and tight swoop over it. "Inurio Bani." A thing but sturdy white bandage emerged from the tip of her wand like a sterile ribbon that then wrapped snuggly around Mercer's finger. That was her position in their relationship, after all, finding the solutions to Mercer's innocent musings and occasional messes. She hadn't meant to perform the act in the middle of Professor Khanna's worries, it just happened to be that way. She felt that this was more than satisfactory for Mercer's current state, but only he knew how he felt it and so she simply returned her wand to her pocket, gave the back of his hand a little pat, and then rose to fetch herself another cucumber.
It was probably for the best that she was otherwise preoccupied during the next question with both carving and imagining possible scenarios with Gherkin telling his kappa colony about all he had seen and experienced at Hogwarts. Truly, for the best, since Mitsuki had indeed faced a kappa without a cucumber and her methods, if one could even call them that, had not been effective. In any case, her second carved cucumber was finished and her name, middle and last since she rarely used her first, were present and accounted for.
Attention forward once again, the Ravenclaw found herself disappointed. Replicas, as realistic and believable as they may appear, were just simply that: replicas. Cucumber in hand, she turned her head towards Mercer under the presumption that he would be that classmate Professor Khanna suggested they work with. "
Even numbers are unlucky," she noted while offering the "kappa" a cursory glance. Meaning they ought to select an odd one in an odd row. As to them being a duo, an unlucky even number, she just sprinkled some salt from her pocket on both of their left shoulders.