Pair of iridescent ovals with tendrils and halos travel rapidly, at high altitude on southern course across Seattle

I observed suspicious aircraft ~6:45 PM 6/24/2023 northeast of Seattle. I was located on my patio in the viscosity of the ferry terminal in downtown Seattle. Objects observed as being northeast of my location, eventually traveling south of my location.
My initial concern was that they were weather balloons floating towards SEATAC / Boeing in the path of aircraft. I took a 3x telescopic zoom video (iPhone 14s) of the objects wherein they maintain similar positions and relative distance to each other, but observed them off camera to drift, and then nearly contact each other. They appeared to have an aura/halo that persisted as they moved south in the general direction of Olympia, and eventually disappeared. One object remained visible for ~20 minutes after the other was no longer in field of vision. I did not see either object disappear from sight - but lost contact while adjusting my recreational telescope.
I was able to use my telescope to observe the object in greater detail, and successfully sighted both objects with a clear view. I observed what appeared to be two undulating, elliptical shapes (iridescent, mainly orange and purple) with distinct attached tendrils / trails. My first thought was that they appeared organic, resembling jellyfish, but appeared to be visibly and uniformly energized / glowing. I did not count at the time, but recall 3-5 trails, roughly 1/5th in size relative to the elliptical shapes. Trails/tendrils were not a wake, and appeared attached to the overall shape. Given their height relative to commercial aircraft flying overhead, they appeared to be very far away (safely above commercial airlines flying past Seattle at cruising altitude, not ascending/descending). Objects remained relatively stationary overhead for 10-15 minutes, before traveling in the direction of Olympia. Objects did not appear to lose altitude, or maintain any particular course/velocity. Objects were moving quickly enough that 10x telescope view could only keep objects in field of view for ~10 seconds before requiring readjustment.
They appeared to be moving in a coordinated manner, but appeared to separate / end coordination as they began moving in the direction of Olympia.
Second observer was also able to view the objects through the telescope, and can provide separate corroborating account.
Both observers are early 30s, gainfully employed, established professionals. Both have masters degrees in their field, and professional credentials/certification.
Oddly, I lost complete cell phone service for roughly 5 minutes, and called the non-emergency police using WiFi. I was located in my home at this time, and have never in 2 years had my phone enter SOS mode within my home.