How, exactly did rose manifest her powers as a seer? How did terezi? Kankri?

I’d say Rose and Terezi are very damn evident, SPECIALLY Terezi since she gets a literal Mind Symbol over her head whenever she’s using her powers. Rose’s search and thirst for knowledge in SBURB leads her to tear down everything in her way just to learn more about what Paradox Space has in store for them. And Kankri’s just… A Bad Example in general, you’d do better taking Suffy as an example and how he Saw glimpses of his past life on Beforus, and Knew and Preached about Bonds and being nice to others and changing the Hemospectrum.