So this is this is my current train of thought:

[indent]Byakugan: The eye of protection, whose powers allow for protection against attack and the quick analysis and neutralization of threats (Gentle Fist, Eight Trigrams, telescopic and x-ray vision). This reflects the idea of the Hyuga as a close-minded clan, never letting ideas or secrets out of their grasp and staying aloof from the affairs and opinions of others.[/indent]

[indent][indent][i]Its not much, but the idea was that the seal placed on side branches was used to control and limit the growth of the Byakugan so that the side branches don't overthrow the main house, and its overall growth for the whole clan was stunted. A part of this seal prevented side branches from unlocking the o' so fabled Chou Byakugan", a second stage of awakening like the Mangekyou but that allows the user to slow their own perception of time, making the opponent seem to move in slow motion as they strike the tenketsu with ease etc. (more to be added)

This is discovered during the First Winter and a split takes place, some from the Main Family wish to attain it, causing a sort of mini-civil war within the clan; with one side holding tight the clans ideas, and those who wish to move from this and attain what they call 'enlightenment'. With support from the Branch Family, the Enlightenment side overthrows the Main Family.[/i][/indent][/indent]


What I have so far.