Of course, Zanbril did say before that he wished Xixie were the chosen one. Let's not forget he mentioned he intended to use their married lives to make her pay back for the slap. However, that was just him trying to put some fear into Xixie, and he wasn't really bothered by that. If anything, he was entertained by the sudden outcome of that test. In the end, after the answers, he still felt that any of the other princess would be a better choice for him.
*Clap!*
Everyone heard that and looked in Zuey's direction, who began to speak. "It went better than I expected. At least it was one of the princesses who reached this idiot's last test, so he has no reason to complain now."
"Brother," Zanbril came forward. "Is that really okay? I don't think our emotions are compatible at all."
