>>3700107She has different modules, but they are rather alternative designs/clothes. Some specific to a song, album, story, producer etc.
But in context of having her as a waifu and sharing her, everyone has their own version of Miku. There is no canon when it comes to Miku, instead you are supposed to imagine her the way you think suits her the most. Or in other words, you just listen to her music and you naturally get dragged to specific themes, and if you actually become a fan of her you inventively form your own interpretation of her character. I happened to fall in love with my version, but that's it, I do not love every Miku from every song, from every producer. When I talk with other Mikufags, they all have very different interpretations. My Miku might be a cute normal girl dandere, for someone else she might be a genki tomboy or some world superstar idol robot, etc. I can't possibly feel jealous towards them, their Miku is like different character, they have their own memories, merch, feelings, story. Even Kondo-san, that jap who married Miku through GateBox and got media attention, if you read his interviews he also talks about how he married "Miku of his house" but everyone has their own Miku of the house, so he is not jealous and he encourages others to get along with their Miku. Everything that makes her a waifu is different for everyone, but we still can enjoy sharing images, news, songs etc with each other.