Noun
aura - The distinctive atmosphere or quality that seems to surround and be generated by a person, thing, or place.
She was immediately attracted to the aura of light and peace that seemed to emanate from him, though she realized this required validation and investigation.
semblance - The way something appears on the surface, often without revealing the true nature or reality behind it.
In spite of their their kids' constant uncontrolled behavior, when they were outside they managed to keep up the semblance of calm, even though things were not so calm inside their house.