(old) cap (garment) / military officer of low rank (in former times) / preceding
弁
=
厶
+
廾
:
Brunhilde (bi) has a cap (弁) sticking in her fake nose (厶) inside the anthill's bathroom (an4) and it's very itchy, but since her hands are cuffed (廾) behind her back, she cannot pull it out.