So basically this deals with Ratchet and his problems.
Ratchet was excited to have a younger sister but she died at birth. Ratchet didn't want to except so he came up with an imaginary sister. When ever Mindi dies it's Ratchet's brain trying to let go but he can't and that's why she comes back. This would also explain why Mindi looks so much like him.
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Oc theroys
Fanfictionme and Mindi_the_lombax were having a conversation on Facebook about her oc Mindi so I'm now doing this