Vivian's had it rough. Always shy because she's so used to being belittled and abused by her sisters Beldam and Marilyn. Even if the people around her aren't like that now, a little piece of her clings to her past. She hasn't been able to integrate into Mario's party as easily as the other party members. Still, she views them all as friends even though she's not used to having any.
But lately Vivian seems particularly anxious about something. Sometimes she gets upset at Mario for the littlest things. Even starting arguments but then apologising.
As Mario and crew continued on their adventure to collect all the crystal stars Vivian abruptly uses her shadow magic on Mario to drag him into the darkness. She releases him a few feet away in the midst of some thick underbrush and foliage where they'd have a bit of privacy away from the rest of the gang.
Not seeming very confident Vivian shoots Mario with her hat obscured stare (though it's unclear if she even has eyes). Her gloves hand clenching and unclenching. "Uh, Mario can I talk to you about something?" ... "This whole Princess Peach rescue thing, do you ever y'know think that, um... That it might be..." Vivian stops and smiles for a moment, but it soon wavers. The silence continues for just a little too long. Leaving Mario to wonder whether she'll finish her sentence or not.
But before Mario can decide whether to reply or not Vivian finally manages to blurt out her words, over her own hesitation. "That it's a waste of our time?" She lets her arms hang by her sides and whatches Mario anxiously for any response, a small pout forms on her ghostly yellow lips now.