All of the new Knights aside from Pomegranate are from Lotus Lake, along with the egg bazooka girl from a few events ago.

As for Lotus, I might spend 300 of my newfound rainbow coins on her. She shares quite a few traits with Oncidium Bride (skill targets all enemies, -15% power for all pests, +15% power for all squad members; all good things) and Lotus has a voice that doesn't occasionally cause me to cringe.