Kitsune den is filled with small interactions to large scene changes if you are one or not. Frankly, Tobs does tend to go above and beyond in giving player illusion that being being the champion of Keros is kind of big deal. Not sure about being Valk, but I guess it would be not worth it from what I have heard. Barely anyone aknowledges it, and it doesn't seem to be presented as all that important. Especially since, unlike Keros, there are dozen of others. Which just beats the purpose of being one, in my opinion.
Edit: Yes, I know that it makes sense for Lumine to have number of winged warriors. But I hope you get what I mean.
PS: What is so special about being a dragon. I am out of loop.