Welcome aboard.
Your character does hit a lot of the areas that are not yet covered, and she makes sense for the covenant.
Hearing that you're doing an investigation focused Guernicus with an interest in Animal I'm tempted to ask if you're familiar with this thread https://forum.atlas-games.com/t/adelbert-a-magi-of-hermes-look-at-intellego-and-astrology/8146/1 ? In that thread, I (with much help from Tellus and others) did an investigation focused Guernicus with an interest in Animal in the same magi of Hermes format. It is a different character to be sure. He's highly intellego focused (rather than mentem) and doesn't even start delving into animal until the 90-105 period and then he mostly uses the animals for more intellego spells. He spends a good deal of time with an astrological mystery cult as well.
I don't know whether to tell you to read it or not. It might be worthwhile to skip it so that your ideas are not contaminated by mine. On the other hand it might be useful to read it to avoid treading the same paths more than once or to gain inspiration.