that's cirno on the left, she's receiving a fishe from sakuya (one on the right) and apparently she is very excited about it but you couldn't say the same about sakuya (one on the right) as she seems quite detached and indifferent to whether to give or not said fishe or maybe she's just not used to show her emotions, masking what could very well be satisfaction from everyday routine, keeping the cirno happy and well fed, thus providing a feedback of generosity which one could interpret as self satisfaction from her blank, even bored, expression but maybe it's in this automaton like face that we can find what means to be altruistic, not for the sake of it, but for the sake of requiring the discussed feedback and connecting souls in a very symbiotic way
