Responses
didn't read any novel so i don't know any spoilers. it could be the plot in this manhwa wherein something major will happen causing a memory wipe/memory fog on all the characters. similarly, artanis nor the other demons can't remember bibeong in TGED so it's a possibility.
ps. writing this instead of sleeping so i dont know if this is legible and comprehensible.

while I do enjoy seeing the same characters in different timelines, it makes me sad that they can't remember each other. aww bibeong and tyrannus (t-bone) reminiscing the scene in TGED where bibeong saw the demon clan for the first time in years and have a feeling of familiarity but not fully understanding why. i'll just kms '))