Who prevented Ryan from falling was Alissa. She grabbed him by the shoulders and then used a healing spell. Ryan was completely dizzy thanks to the attack, so she used Purification as well, and that happened.
"It seems he is kind of familiar to Thanatos, even his combat style," Femradiel said.
"Oh, yeah," Alissa said. "You guys defeated his brother, so, what do you mean by that? Maybe we can find a way to counter his attacks by recalling this fight of yours."
"Thanatos can control death itself, so he can cause damage just by thinking," Femradiel said. "As long as he can see you, he can damage you just by thinking and you can't do anything about it."
"That seems like a real pain, so how did you manage to defeat him?" Alissa asked.