Ikebana (生け花, 活け花, "arranging flowers" or "making flowers alive") is the Japanese art of flower arrangement. It is also known as Kadō (華道, "way of flowers"). The tradition dates back to Heian period, when floral offerings were made at altars.
When we read that book in school I used audio book you can get with a free trial!!
Answer: smirking
/ˈsmərkiNG/
adjective
smiling in an irritatingly smug, conceited, or silly way.
"a smirking teammate offered mocking applause" (Oxford Languages)
Explanation: In my own words I would describe Smirking as a type of smiling mostly a specific type of smile for when you do something you know you shouldn't have done or if you feel guilty but also are enjoying it like when you set up a prank and it is about to unfold
Hope that help and makes sence