Red Angel

The Red Angel was a human time traveler that was connected to to several red bursts seen in the 2250s by both the Federation Starfleet and the Klingon Empire.

Project Daedalus
The Red Angel was a temporal research project undertaken by Starfleet's black-ops division, Section 31 in the 2230s. Section 31 learned that the Klingons were looking into temporal research. The project created a suit that could allow the wearer to travel through time with the assistance of a time crystal and micro-wormholes. The suit would then generate a graviton beam in order to keep the wormhole open and the wearer to return to their own time. The suit was about to be tested by Section 31 operatives Dr. Gabrielle and Mike Burnham on Doctari Alpha. Unfortunately, the klingons launched a raid on Doctari Alpha, killed Mike and Gabrielle Burnham, and the suit was presumed to have been destroyed.

Earth
The first known temporal incursion by the Red Angel happened on Earth in 2053. During the Third World War, the Red Angel saved a group of soldiers and civilians at the East Fork Presbyterian Church in Richmond, Indiana. The Angel was able save the group from nuclear weapons by transporting the church to Terralysium. The group survived on the planet for the next two centuries and created a religion around the Red Angel. The USS Discovery (NCC-1031) under Captain Christopher Pike discovered and the colony of New Eden. One of the colonists, Amesha, told them the story of the Red Angel. Pike was given a helmet that showed footage of the Angel.

Vulcan
Spock, as a child on Vulcan, claimed to have spoken with the Red Angel, who told him to find his foster sister Michael Burnham when she tried to run away to Earth. Spock's parents, Sarek and Amanda Grayson assumed that the Angel was just a figment of Spock's imagination until the 2250s when the Angel reappeared.

USS Hiawatha
Following the appearance of several red bursts, the USS Discovery (NCC-1031) under Captain Christopher Pike arrived at a asteroid and found the USS Hiawatha (NCC-815). After rescuing Commander Jett Reno and her patients before the asteroid and Hiawatha collided with a pulasar, Burnham saw the Red Angel.