"to Ingisson" "to Eltnen" and other such labels are rift times.
The green ones are rifts that elyos can use to rift to morheim, to gelkmaros, and to beluslan, to kill guards.
The blue ones are rifts that asmodians can use to rift to eltnen, to ingisson, and to heiron, to kill guards.
Rift guards only spawn for 1 hour during the rift times, and then disappear.
Here is a map of every single location of these guards: