I am absolutely 100% canonblind to your charas, but I really think they're both fantastic. Miko is a delight as always, her character type is so much fun and I always love both playing with her and stalking her threads with others. Her CR with the Charmings is especially lovely!
King is a really good fit for the game and you seem really excited about playing him, which is great! I really look forward to him building more CR and getting settled in Kiseki.