Normally, a Gloranthan character has affiliations with the Runes of the gods, spirits, principles of his belief system. Those are his spritual anchors in the vast spiritual world of Glorantha. - Most major gods or divine beings have three Runes (Orlanth, for example, Air, Mastery and Movement) - but some different aspects, subcults or regional interpretation may have different rune association for the same god! So it is a highly cultural dependend questions, to which Runes a character may have an affiliation.
And those Runes of the main spiritual belief system are not even close to all of the runes accessible or important for a character! - There are A LOT of Runes in the world Glorantha. And so some characters might pick up quite a lot of affiliations to very different ones - yet rarely in any meaningful intensity (but not unheard of).