I feel like kay's "mom" is trying to look like that light goddess cus the reaction from the demon lord when she saw kays "mom" looks like she saw her lover yk the light goddess. And kays "mom" is imitating that goddess(if u look back at the flasbacks where light goddess appeared she looks like kays "mom") cus she knows demon lord is soft for light goddess
I feel like kay's "mom" is trying to look like that light goddess cus the reaction from the demon lord when she saw kays "mom" looks like she saw her lover yk the light goddess. And kays "mom" is imitating that goddess(if u look back at the flasbacks where light goddess appeared she looks like kays "mom") cus she knows demon lord is soft for light goddess