Snollygoster
To be honest, i actually hate for Dora being the love interest. As Cliche as Fleur is, she just works... Dora doesnt seem apparent to the story much besides the MC's obsession with her and his familial connection to Ted and Andromeda. Btw this is just my wholeheartedly opinion so yeah dont complain about it.
the way you wrote this not including fluer just feels bad now shes got just a good character build in your story and with chris working on her personality and the budding crush it just feels right to build her into a poly ship with chris and Dora chris also was the one to help both have brighter lives ect plus I think your Dora and fluer can build a great sister ship both love dueling both were ostracized for something they were born with Vela most likely wouldnt have an issue with poly or being into women and dora could easily be bi just seems so easy and right to ship all three plus he is heir to 2 houses