1. She is very protective of children or childlike-things. In canon she's sort of motherly/big sisterly towards 3 & 4 despite them being older, but she full expects everyone else to pull weight. I think she feels the need to protect that which cannot protect itself while teaching by way of example how to protect to those who are capable but unknowledgeable.

2. She's left handed.

3. Her greatest fear is dying. This may seem a little contradictory considering how readily she'll throw herself into dangerous situations, but that may just be her idea of facing her fear. In Canon the times that she's been face to face with it, she's definitely not as composed as when she's running from it or fighting it (i.e. hanging in front of the B.R.A.I.N. and being taken by the Seamstress).