This is super normal and acceptable for the both of them to be biting whole hog into raw onions. Surely nobody would ever take umbrage with such an activity. Elidibus, at least, clearly sees no issue with it.

Taking the time to chew and swallow - it is prudent to be polite - he smiles at Byleth in answer.

"I have been enjoying myself greatly, yes." Somehow the shorter man is entirely dry, despite clearly having been bobbing for onions himself. He does have a bag of his own. "Festivals are not for all, though it is good to hear that you have found some activities to enjoy, dear Byleth. The reward will be most useful for my culinary pursuits this coming winter."

He raises his onion bag slightly. "I am glad there appears to be no limit to these, so each may receive their own."