Help | Adopted by Bowser

(Y/N) of Sarasaland, you were the Empire's hero, their only hero.
Before you came around, some people from the mushroom kingdom had to come over and save it, but now that you were there, and you had gotten sufficient training, you were ready to keep Princess Daisy from being kidnapped.
But.. no one ever saw you, no one ever knew you, as you were a private guard you the princess, no one saw you, no one knew... no one.
Even the princess seemed to look through you, like you weren't actually there. You were alone, even with the constant company of the princess.
Her servants were even worse, because they saw you, they did, and they treated you horribly as if they wanted the princesses body guard to be gone, and you couldn't tell anyone because they'd tell you you were supposed to be strong and not bothered by it, you were supposed to be strong why were you crying, how can you protect the Princess like that?
Finally you decided you had enough.. you didn't want to be strong anymore..