Keiran wasn't angry after Alicia chose to stay in the dark land, he even smiled slightly when he heard that Alicia really appreciated his efforts. He is also happy that his only friend didn't leave and stays with him.
Although annoyed that he failed to bring Alicia out of the dark land, he felt that his defeat against Queen Lethia gave him a pretty good result.
"I have agreed that I have accepted myself as a vampire. So, for now, please guide me. Please train me to be strong like you." She grabbed his hand and stood up to him. Not wanting to continue discussing her regrets, she immediately changed the topic of their conversation by looking down while begging for Keiran's help.