Lilith

Lilith is an employee of the House of Love. She build devices who are selled. She is also implied in the hidden slave traffic who occure in Anvil, ruled by Melissa and Nicole. So, when Melissa told them that Lilina can grow a penis since she learned futanari spell, they tried to turn her into a permanent futanari, then sold her to Rowling. Since Lilith is the one who succeed, it mean that she have huge knowledge about lust magic.