King x Reader x Arthur Pendragon

Sutari is the Cat Sin of Sorrow, demon cat Princess
and familiar chosen by the demon king himself
to look after and obey Meliodas and his brothers
but after years of following him around
and getting to know him she realized how
much he loved Elizabeth and
vowed to protect Elizabeth from any
harm as long as she shall live
since she never understood or cared for love or any other emotion because of all the pain she
endured as time went on all she knew
was sorrow and she enjoyed
seeing others go through that exact same
pain after the Holy War ended that is until she
met a young Diane and the king of
the fairies and after staying
with them for a few years she left then years later she became a member of the Seven Deadly Sins and
spent her time protecting Liones with them
but once the Grand Master was killed
she was separated from her master once again
but when she reunites with everyone she becomes
over joyed even though she
doesn't show it
but that all changes when she
meets the King of Camelot she is
able to smile for the first time in her life
which is a huge surprise to
everyone even King
who has loved her ever since he met her years ago
but even after just meeting her Arthur falls in love with her and her smile and will do anything to keep her smiling but there were only two other people
that ever made her smile and that was Zeldris
and Estarosa they also loved her
but when the demon
king found out that she was siding with
Meliodas the demon king sends
them to kill her and even though they
didn't want to hurt her they followed there commands and injured her so bad she was on the brink of death and now she hates them with every fiber of her bene
so when she sees them again she becomes filled with rage and tried to attack them just to end up being kidnapped by them and that breaks Arthur and
King when they got word about it they
vowed to get her back when Meliodas got word that she escaped and was on her way back that relieves King and Arthur