Thinking about it, we might actually have star increase quest for some character, if we do those quest they will ascend to a higher star, gaining new skill set or bonus one, gain better base stat. Character like Amber, Noelle, Razor, Kaeya and the obvious Lisa all have the potential to gain it as there lore is already grand enough for it, their star doesn't represent their power level or they can become far stronger and important in the future.
A good example is Noelle, she currently have the personality fit for both geo element devotion for oneself and other people or to a contract,find enjoyment in fullfiling their own goal, devotion to the people not to oneself and do it voluntarily, find enjoyment in helping other or to see came closer to make someone you care for no matter how hard it's.
Noelle fit both of this completely which is quite ironic, one element is the heaviest while the other is the lightest, one bound you to the earth the other free you from it, one vision show that someone need to be little bit more grounded or end of losing and destroying themselves in the process of chasing there goal while the other show that they need to lighten up their burden or risk slowly dying or crippled in regret of not being able to help those that they want to help as they stop due to illness, overworked, lost or running out of idea.
She help everyone to prove herself worthy of becoming a knight of Favonius but she also happy to help other and sometime doesn't seem to care about becoming one, she isn't grounded at all as she don't know when to stop and just keep training and continue to participate in the knight exam despite failing everytime and her hidden desire to help other in the guise and actual feeling of wanting recognition also don't allow her to rest as even after saving that adventurer in dragonspine, she barely rest for a person that have gone through what she did and continue training, helping other when they need her.
The reason why she got Geo instead of anemo is beacause of what i said above "desire to help other in the guise and actual feeling of wanting recognition" it overshadowed her desire to help other that she doesn't even know it, only unconsciously showing it from time to time, but after entering the knight, both would be balance out as now she would only want to be recognize as a good knight, is both duty bound to being of service to people of monstadt and protecting them while also enjoying and happy to serve them as well as protecting them even if she doesn't gain anything at all from doing so of course she would still overwork her self for both a selfish and selfless desire but that's just Noelle, at this point she would be completely qualified for both Anemo and Geo vision, we never heard that one can only have one vision and the one that give it isn't celestia but the archon so i could potentially see tsaritsa seeing this girl that already rival or even surpass most of her harbinger power, decide to just give her some boost to increase teyvat forces power to fight against celestia and give her an anemo vision. Thus we have the first or maybe not but one of the few who was able to gain two vision tortila's going to hear this and run over monstadt to fight her just to get swatted around like a fly till he get in to FLT which doesn't do jack and he add another person into his short list of rival.
Edit: looking at this post, noelle might also click completely with me but i just don't know it yet, i will tell you guys once i finish her hangout event.