The phrase "blue aura" refers to the energy or glow that surrounds a person and is believed to represent calmness, clarity, and spiritual connection. Full definition
Also, Koei - Tecmo shared some details about that scene from the Japan Expo 2017 trailer, where Chrom is envelopped in a mysterious blue aura, which is then sucked into the Shield of Flames. (perfectly-nintendo.com)
Style Name: Ag The Ex Boyfriend Crop Jeans (12 Years Blue Aura). (polyvore.com)
With gorgeous, tilting planet Earth far below in its shimmering blue aura, a bulkily suited spaceman and spacewoman veer, swoop and swerve in woozy slo - mo as they go about their business tethered to the station, like foetuses still attached to their umbilical cords. (theguardian.com)