do you think that discipline effects which character i can get? I've never really tried it, but maybe someone manged to get a character other than the universal ones without giving a single discipline.
I personally think that the evolution of Tama's is completely random, but it may be possible that a Tama with a higher discipline level may evolve into something better (like Mametchi) that a Tama with a lower discipline level (like Gozarutchi).