This reminded me of my first really bizarre encounter, when I was young.
Several months after my grandfather passed from cancer, in the early 1970s when a diagnosis of cancer usually meant certain death, we were visiting my grandmother during Thanksgiving. My aunt and uncle were in town from Huntsville, so the house was full of people.
I was sleeping in the living room when a bright light woke me up. I figured it was someone getting something from the kitchen.
I opened my eyes to spot a bright, blue flame thing hovering at the foot of my mattress. I began to panic, about to panic and freak out when I was hit by a blast of warmth, and I was suddenly very calm. A voice said “Go back to sleep, it’s only me..”
Most people see human-type forms, but this was a blue flame. My daughter has seen it near me recently, BTW. I asked and it's some type of higher level spirit hanging around and checking on me. Like a Guide for Guides..
It most definitely was NOT my grandfather - I've seen him as well, always a simple presence or smell (Old Spice cologne...)