當費備使用一級魔法使的特權，獲得了賽莉耶的「無論怎樣的衣服都必定洗乾淨」魔導書之後，她向芙莉蓮大人自滿一番時...
When Fern got the grimoire - absolute cleaningness of clothes - from Serie, and she's so proud of her clean & good smell after wash in front of Frieren...