Imagine if Rhea/Seiros had a son, it'd give her more humanity besides "shady pope lady"
Not sure why a son specifically but strictly speaking she did care about Sitri and the other "failed clones" before her like they were family, perhaps even children to her. Only mentioning Sitri pains her visibly, and in the side story she mourns so deeply she doesn't bury her but preserves her body in the catacombs to visit her regularly. Unhealthy, but ultimately not harmful to anyone.
And she has plenty of humanity on her own as well. She worries the students find her intimidating, she constantly takes in orphans to be cared for at the monastery even at risk to her own safety (like the children of the thieves she had the Blue Lions fight, they end up attacking Dimitri instead of her but she did give the order and still took them in).
She cares deeply about the people in her care to a point she starts a religion and changes historical records to protect them, which is shady as fuck but very human.
Her favorite teas are Angelica, Crescent-Moon and Chamomile, she likes receiving landscape paintings, she loses her hair clip just like other people lose theirs
She likes talking about books, about gardening and cooking mishaps, she admits to being lonely in her position and being able to speak as herself to Byleth only. She leaves notes in the advice box
She loved her mother, she lost all of her family and friends aside from Seteth and Flayn, who only woke up recently after 1000 years of slumber, she's suffered immensely and all alone for so long she's become desperate and unstable, but she learns from her mistakes and genuinely tries to atone
She protects both the monastery and Byleth's forces at Shambhala at the expense of her own safety and even her life. And that is, as she admits herself, long after she stopped seeing Byleth as a replacement for Sothis
Rhea is incredibly human, with all the virtues and flaws that come with it. Perhaps even more so than the humans around her due to the depth of her emotions and immense age. Her good and bad deeds run fat deeper than and reach much farther than those of a person with less power and witnessed history.
Rhea is so much more than "shady pope lady", you just gotta know where to look.












