Please remember that these are my personal headcanons from shows and books that I enjoy. It's fine if you don't agree with them, but don't hate me on it. Anyways let's get started.
Voltron
Krolia is a 2nd mother to Romelle
I like to believe that Krolia is like a mother figure to Romelle. Krolia was the first person who she confided in about Lotor, and I think it caused Romelle to get closer to the Galran. Also Krolia might've used it as an opportunity to be the mother she never was.

Romelle had a crush on Allura
Almost everyone in the fandom shipped this! I wish it became canon! But I do like to believe Romelle was in love with Allura for at least a small portion of the show. She never acted on it because she didn't want to try to start something with Allura after her messy break-up with Lotor. Also she saw that Lance had feelings for Allura and didn't want to get in the way of that.

Romelle suffers with frequent nightmares
Are you noticing a pattern with all these headcanons? Sorry, but I love my little Altean cinnamon roll way too much! Anyways this headcanon seems pretty reasonable. She watched her brother die in front of her, had to see many of her friends and family dead from having their life force drained from them (one of the most horrific scenes in the series), has no family left, had to fight against the people she grew up around, watched Luka die, and got tangled up in a 10,000 year old war. If that doesn't traumatize you then I don't know what will. Romelle makes Allura's sad life look pretty good. This has to cause nightmares!

She-ra and the Princesses Of Power
Spinerella and Nettossa helped raise Glimmer
I'm pretty sure these two princesses were part of the original alliance or are at least quite a bit older than Glimmer. Angella had to have been busy after Micah passed away. Since the girls came around often they probably did a few babysitting jobs in Glimmer's early life. I don't know the show will probably shred this headcanon later, but I don't care.