Split Sans Final stage

Description: When Gaster just started testing on sans he noticed something strange but brushed it off later when he was testing sans' soul. It fractured he was panicking now but reacted quickly instantly he began to try and fix it with a spare soul he had. Almost instantly the two souls started to fuse forming sans' split personality one of bravery and the other of integrity but he doesn't show them at all he rather stays neutral that's why he doesn't smile. Oh, but the whole underground was also affected. All the monsters also formed a split personality. this is what I call the Split AU