Click on which theory you want. The theories I believe in the most are Theory 1 and Theory 3. It takes a while so if you're a quick reader please wait because sometimes there's a second part.
If you remix, please change something. If you're remixing to share your Theory 7 then please just write in the comments. Thank you! ↓↓↓ ↓↓↓ I would like to share some theories I got in the comments. Also guys if you have atheory but don't want me to put it in the notes and credits just say so and I won't. @Awesomesauceabby A theory is that her gift is seeing what's going on in people's minds, including her own. Almost every song features some special effects that represent the character's feelings, for example in "Surface Pressure" it shows how Luisa feels like she's hanging off a cliff, carrying the whole earth, getting sucked into a tornado, etc to show her pressure, and in "We Don't Talk About Bruno" Mirabel can see the wedding day because that's what's going through Pepa's mind, and the same thing in "Dos Oruguitas" with Abuela's memories of Pedro. @ElfDemigod A theory is that Mirabel's gift was brains. In The Family Madrigal she says "The beauty and the brawn do no wrong," and it seems like that should include brains. Also, Mirabel is just pretty smart in general. @mrrecordman A theory is that Mirabel touches the doorknob with the right hand. While Antonio touches it with his left. @Daggersloth Another theory is that the Casita knew that they would need someone who doesn’t rely on their gift to save the miracle. (Like when they run to the candle but when Camilo shapeshifts he turns back to himself and Isabella’s vine disappears.) @aadhyacamp Theory 6 is that mirabel actually represented the whole family so she made the new house magical by letting the family in and just like princess Anna from frozen she has infinite love for her family... Time travel. A Theory 6 is that Mirabel is part of the magic herself. She is one with the candle and Casita basically? For example after "Waiting on a Miracle" when she was upset the Casita started cracking, and when she argued with Abuela at the end everything fell and the candle went out. Then when she and Isabela finally got along the candle got brighter and the cracks healed. Also everyone has symbols of their gifts on their clothes but Mirabel has butterflies which are all over the Casita and candle. Maybe the magic didn't think mirabel was ready for a gift when she was 5 and instead gave her the front door when she got older.