This is how Starlight Glimmer reveals Tino' past in Starlight Glimmer's Return.
[we view Tino and Starlight Glimmer, face-to-face. Starlight prepares to use magic on him but suddenly stops]
Starlight Glimmer: You should've discovered your past earlier, Tino Starbright!
Tino: What the hell do you mean?!
Starlight Glimmer: [sighs] Your father was trying to protect you. He didn't want you to get hurt by Lord Jasper. So, now that you have, every humicorn-demon is after you.
Tino: No! That's a goddamn lie! and you know it!
Starlight Glimmer: No it is not! I'm telling you the truth!
Tino: And that mean's I'm just... no...
Starlight Glimmer: A Humicorn, Tino. You're one of them. Your people, your real home.
Tino: This...this can't...be...true.
Starlight Glimmer: Well it is true. Why an young boy at your age, you should've become a humicorn legend long ago. [leaves]
[Tino lifts his sleeve and looks at the cutie mark]
Tino: It...it...is true. [sighs] I give up.