Becomingkillersans Histoires

I somehow become killer sans!? (Different everything, different beginnings, different personalities, different multiverse, multiverses etc

What if..someone was transported as a orca mer bit was also killer sans? What if..they were also the reincarnation of killer who was a mer in that au but died a while back protecting one of the others? He doesn't get any of killers past memories...well mostly until he starts getting some flashbacks later on... (Different things, different personalities