As far as Steve's seen Exos never seem to get tired the way humans or Awoken do. Blaze least of all. But there is something... almost weary about the other Titan, when she materializes down the hallway and calls out to him.

"Steve! There you are." Ghost appears beside her, glancing over Steve and Siri uncertainly as she talks. "You had us a little worried when you left early. Everything all right?"

Siri said he was fine, Ghost would have dragged her back a lot sooner if he wasn't, but... it was his first Dawning. She wants it to have gone well, even if she and Ghost weren't keeping watch.