I dont even consider these as kins because I literally am these characters and they are me.

Larry Johnson (Sally Face)

Ciel Phantomhive (Black Butler)

Hitachi Shinso (Boku No Hero Academia)

Tamaki Amajiki (Boku No Hero Academia)

Harlequin/King (The Seven Deadly Sins)

Then there are the kins that I'd rather not have doubles for but I'll occasionally make acceptions for.

Shouto Todoroki (Boku no hero academia)

Twice (Boku no hero academia)

Soul Evans (Soul Eater)

Marshall Lee (Adventure Time)

Denki Kaminari (Boku No Hero Academia)

Nico Di Angelo (Percy Jackson)

Katie Holt/ Pidge Gunderson (Voltron)

And finally there are plain out kins. These are the the kins I'm 100% okay with doubles!

Connor (Detroit: Become Human)

Viktor Nikiforov (YURI!!! On Ice)

Takahashi Shirogane (Voltron)

Meliodas/ Captain (The Seven Deadly Sins)

Gilthunder (The Seven Deadly Sins)