Marisol Lopez Lugo is Timothy and Theodore Templeton's babysitter and Tim's secret crush. She is voiced by Sarah-Nicole Robles. although Marisol finds out that Tim likes her and in Halloween, Tim reveals that he likes Marisol he thinks that she would hate him but actually replies in "Nahh it's cool".
She has many young brothers, which as stated in the series, makes babysitting in her blood. She has a great business mind, which temporarily makes Theodore Lindsay Templeton/Boss Baby fall in love with her.
She considers costing her business as crossing the line in season 2.
- She likes board games.