@Spamamdorf
Yep the anime follows the true end, they're the same. The extra ova ep is considered canon on top of the true end.
---
Since double posting would be kinda bad, here's some info on a new project being released this winter
Pandora of eternal recurrence, it's a novel (with some sort of drama CD tie in?) being released this winter. That's part of the official post series material / side stories.
That new girl is Kurisu’s senior for the department she’s in for college. She’s 21, half American and half Japanese. Her voice actress is Sayuri Yahagi. The character’s name is Maho Hiyajo