Annabeth recognized something ...

Annabeth recognized something else in her face, too - in the hard set of her mouth and the deliberate way she raised her chin like she was ready to accept any challenge. Reyna was forcing a look of courage, while holding back a mixture of hopefulness and worry and fear that she couldn\'t show in public. Annabeth knew that expression. She saw it every time she looked in a mirror.
Annabeth recognized something else in her face, too - in the hard set of her mouth and the deliberate way she raised her chin like she was ready to accept any challenge. Reyna was forcing a look of courage, while holding back a mixture of hopefulness and worry and fear that she couldn't show in public. Annabeth knew that expression. She saw it every time she looked in a mirror.

Quotes from the same author

“It’s natural to feel fear. All great warriors are afraid. Only the stupid and the delusional are not.”
The main courtyard was filled with warriors - mermen with fish tails from the waist down and human bodies from the waist up, except their skin was blue, which I'd never known before.Some were tending the wounded. Some were sharpening spears and swords. One passed us, swimming in a hurry. His eyes were bright green, like that stuff they put in glo-sticks, and his teeth were shark teeth. They don't show you stuff like that in "The Little Mermaid.
Everybody was patting Nico on the back, complimenting him on his fighting. Even the Ares kids thought he was pretty cool. Hey, show up with an army of undead warriors to save the day, and suddenly you're everybody's best friend.
Back up shall we? When my brother, the crazy chicken warrior, turned into a falcon and went up the pyramid’s chimney with his new friend, the fruit bat, he left me playing nurse to two very wounded people—which I didn’t appreciate, and which I wasn’t particularly good at.
Aphrodite strikes again, huh? You're gonna be the best-dressed warrior in town, beauty queen.