Generally Speaking, I hate limiting character creation options. You can feel free to use whatever is out there (when using non-core mechanics, please not book name and page number). That being said, a few limitations are required:

  1. You can only have 1 living Chimera (Chimera Companion). It can be a "collective" thing, like an anthill or a bee hive, but not a flock of birds.
    1. Nunnehi: You can have 1 Spirit Companion instead of Chimerical Companion
  2. You can not have more than Rank 4 (Count).
    1. Hsien: Maximum Influence 2 (Minor)
  3. EXPLAIN. Every stat in on your character must be easily understood from her story. Especially high-ranking traits.