Kiara had lost all memory prior to being reborn humanoid, retaining only basic knowledge. So Watson didn't know if she should tell the truth: that she'd lead to the apocalypse in at least 18 timelines, killing her in some.
She chose partiality. She was on a mission, and needed to recruit 3 other myths. She'd gone after Kiara as backup.
Kiara was happy to help. She was still a part-time warrior.
When Watson named the others, the phoenix froze on one.
"L-Let's… Save that one for later. How about her? Sounds reasonable."
"Does a Cthulhu's priestess sound reasonable to you!?"