What does "under the spell" mean?
Native speaker’s answer
Rebecca
To be "under the spell of [x]" means to be fascinated, attracted to, or highly influenced by something or someone, like a person who is affected by magic or a spell. In this case, the speaker has used his face to hypnotize the girl. Ex: She's under his spell. She'll do anything for him. Ex: The princess fell under the witch's spell.