Help needed stating an ancestral spirit NPC

[Refplace]

Yeah lot of ways to go here.
Patron if it is background but can provide resources and aid.
Ally if it goes along adventures or directly helps out all the time.
Contact if it provides very minor services or useful information once in awhile.
Special effect for various powers.

You really only need to build it if it is an Ally and even then can often get by with just an approximate build.
If it is an Ally you can apply some of the modifiers for Patron, such as minimal intervention if it is always intangible and does not directly do anything most of the time. Then take powers with Granted by Familiar.
For example the cleric could have an extra level of Magery or Power Investiture with Granted by Familiar to represent the spirit giving him a little subtle aid.