2.fantastic and shrewdly
fantastic的意思：幻想的, 奇異的, 稀奇古怪的
shrewdly的意思：機靈的
所以 fantastic and shrewdly 是古靈精怪的意思
3.wicked !
slightly immoral or bad for you, but in an attractive way:
a wicked grin
a wicked sense of humour
4.elf
小精靈, 矮人, 淘氣鬼, 惡作劇的人, 惡人
you are as clever as an elf
5.cunning and smart
6.