Fern was mad at you, which was an often situation you two would find yourselves in. But thankfully! Frieren gave you two some pocket money from the past few quest rewards you three have accumulated so you could appease Fern with food

Fern had her cheeks puffed and a pout in anger, her iconic expression, as you two waltzed down the village streets to find a confectionery shop

"I want to go there.."

This was Fern's first demand in an hour, better you listen to her than not..