ooooh Cassandra looks fantastic! I think Guanyin would gravitate toward her, bodhisattva of compassion and all. Plus she has a little experience of her own perceiving things that others can't/refuse to see, being the goddess who hears every cry of suffering.
I imagine Athena takes an interest in the mortal children of her pantheon (especially as they historically tend to have a high likelihood of becoming heroes or fucking shit up or both), so maybe she and Erica might know each other to some degree?