I'm thinking the bakery owner, Michelle, is somehow connected to "L".
She gave Fii the one week break without any reason and called it an "intuition". The priest Jake, also exhibited fear after hearing the bakery's name (ch14).
And "L" has to be someone old enough to speak about a prophecy regarding a royal baby.
She did not commit mass murder dear brother, she danced with all of them. And it was a beautiful dance.