本
=
一
+
木
:
Beelzebub (b) finds a Christmas tree (木) in the encampment ((e)n3) and feels like eating its roots (本). He uses a flute (一) to chop the roots right off.
歌
=
哥
+
欠
:
Guy Fawkes (g) lost a bet to his elder brother (哥) Godzilla (哥), who is waving with the IOU (欠) note Guy Fawkes signed when they made that bet. Now he'll have to sing a song (歌) to Godzilla in front of the elevator (e1).