You could always take the 'Spirit Affinity' positive quality, and have a low-power spirit as a high-loyalty Contact.
With an appropriate background (and the positive quality), I'd probably allow a spirit with Force = Connection rating.
So for 20 BP, you would have the positive quality (which in itself is a good option for a summoner), and a Force 5 spirit Buddy who may even risk their life for you (Contact rating of 5/5).
Would be very much subject to GM approval, but is more of a Guardian Angel option, as the spirit in question is in no way bound to you, but likes you and (with a big Loyalty rating) may be watching over your shoulder.