At a young age after some event happened, Asterisk grabbed Serif and ran to a new portal, aka the Pacifist Undertale AU, and put one of his last AU’s stars in Serifs right eye stating that as long as Serif lives, so does his AU. Before Asterisk left Serif on Sans and Papyrus’ doorstep for them to adopt him, then leaving to do his own mission, Asterisk now returning to see if he can find his lost brother again along with his annoying dad, Gaster
Asterisk can be Rude and Grumpy but Caring