Redglare! I'm not sure how much of Mindfang's journal she read, but she saw enough to totally fall in love with that limb-stealing justice ninja and want to model her Flarping gear/persona on. I mean, who wouldn't, am I right?

After the Team Charge debacle went down, there was a period of time where Terezi wanted to throw away related to Redglare. Modeling yourself on your ancestor is actually pretty stupid! The choices you make now should be the ones you want to make, not because you're trying to chase someone else's legacy.

Eventually she decided to keep up the justice thing, because she realized she enjoyed order and crime scene investigations and the law for their own sakes, not just out of some desire to step into Redglare's shoes.