Currently: "In the Beta version, gender, nameday, and guardian do not affect his/her attributes"
However if you consider what all the guardians stand for, there are some ideas that you can get.
1) Each guardian is alligned with an element, so possibly guardian choice could add an increased factor of elemental resistance/power.
2) Each guardian has a story that gives them certain traits: e.g. Halone is a godess of war so perhaps having her would give an increase to melee characters. Llymlaen is a fisher so perhaps she would grant bonuses to Fishing.
3) With your moons and stuff, perhaps when the calendar falls into the moon/month that you belong to, you get bonuses on your stats or maybe even exp/item drops
4) With your nameday, maybe you get a birthday prezzie?
Just some thoughts
Edit: This Thread
has all the guardian info in it. Edited, Sep 2nd 2010 10:44pm by Magnesium02