- Pronouns
- she/her
- MarioWiki
- Mario
I think Luigi idolizes Mario for a lot of things (which is shown in the games if I'm not mistaken) while Mario doesn't idolize his own brother as much simply because Mario was fed all the attention and praise (think about promotional material where even in the huuuge universe crossover, he'd still be the biggest and most important) so he's accustomed to receiving praise and idolization, but isn't accustomed for doing the same. He might have a hidden insecurity; if it's really part of my headcanon, it would mesh well with the twin aspect; they both have the same insecurity but Mario disguises it and Luigi shows it better.
That's not to say he's mean; he'd give credit to where it's due and apologize if he made Luigi upset or cry even. But I think people would act the same if they were fed A-tier celebrity attention nearly daily, and you're probably more famous than Earth's most famous celebrity (as Mario has rock formations belonging to him, a space station with his name on it, companies named after him, his face everywhere on billboards, and so on): a little big for their already-big boots sometimes.
That's not to say he's mean; he'd give credit to where it's due and apologize if he made Luigi upset or cry even. But I think people would act the same if they were fed A-tier celebrity attention nearly daily, and you're probably more famous than Earth's most famous celebrity (as Mario has rock formations belonging to him, a space station with his name on it, companies named after him, his face everywhere on billboards, and so on): a little big for their already-big boots sometimes.