His relationship with error doesn't change at all. (Not much explanation Not much known about what he does with this ability) His abilities include something to do with stars. He has developed a weird, half-innocent sense of humor (which means he could probably say things and make jokes that would make others feel uncomfortable by accident.) His eyes are magenta with white pupils with yellow rings around the outside of his irises.īefore becoming an error, His personality was like Underswap Sans' albeit a bit more innocent and friendlyīlueberror would have liked to make friends and would have begun to socialize with those in the Omega Timeline (once he was deemed not threatening, but kinda wacky.) He finds a bit of home in the Omega Timeline. His nose and eyes are blue on the inside. three yellow stars are near his right eye, while there is only one near his left eye. He wears a red scarf instead of a blue one. his shirt (chestplate?) is also black but also has blue sleeves underneath his black half-circle pauldrons. He wears black pants that have a vertical yellow stripe on each leg. He wears black gloves and his armor have mostly changed as well. Blueberror is a black skeleton with purple/blue arms. His appearance looks like Underswap Sans's, but has also changed his appearance. He chose to forgive, and try and accept his new lot in life. while blue would get over his rage towards Error, recognizing that his anger was just poisoning him. and error, horrified by this result would distance himself, realizing that he did the same horrible thing to someone else, that he did to himself. So, the other Underswap Sans would have had a happy ending there.īlueberror would have likely gone through all the stages– he would have been furious at Error, nearly trying to kill him, etc. blueberry became an error.Īt some point, he would have found a home in the Omega Timeline after defeating error!undyneīlueberror would have recognized he could not go back to his old timeline the way he is now and would have given his world, to the other Underswap Sans that was in the Omega Timeline. this assumption angers error so much that he abandons blue in the anti-void with the human soul and as a result of being trapped in the anti-void for so long. deeming this as manipulation, error snaps at blue and confronts him on what he calls 'fake friendship', and shows him the soul of his human and explains the concept of resets, explaining how he didn't just randomly attack his au, but rather observed his au waiting for the right chance to strike, error then attempts to get blue to fight him, resulting in blue believing that error doesn't want him to right them and that he has found errors weakness, that being that he is scared of friendship. Over time Error becomes more accustomed to Blue's company, eventually showing him a Transdimensional window of his first time leaving the anti-void as well as his first kill, this, in turn, makes blue extremely uncomfortable, leading him to say 'I'm still your friend, error. for unknown reasons error has decided to abduct Blue rather than kill him, leaving papyrus to be found by CORE!Frisk and be taken to the omega timeline.

Once a swap!sans called blueberry, his au was almost completely wiped out by error except both sans and papyrus.

Underswap papyrus and blueberry