okay, these are vague ideas because i wanted to discuss them in more detail with interested players, but:
A) Astral Guide. A spirit that has known Andromeda since her very first time astral projecting. This spirit is not just her guide through the astral realms, but has become a good friend of hers.
B) A Free Ride. Astral traveling is very dangerous, especially when you are gone from your physical body for too long. Andromeda has attracted a spirit (or demon) that wants to highjack Andromeda's body, but can't until she has given them permission.