Artist's commentary
Commission: Tiara Mitsubishi
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Commission for: Mei-N.
OC which happens to be a rather rare and barely known type of monstergirl from the Monstergirl-Encyclopedia.
The name of this OC is Tiara Mitsubishi and she's a "Trumpart" which happens to be a type of monstergirl native to "Wonderland" (the same kind of wonderland also mentioned in the book "Alice in Wonderland").
Trumparts basically are the monstergirl-version of those card-soldiers in Alice in Wonderland and, similar to the book, the MGE-version happen to be the loyal servants of the queen of hearts.
In the case of Tiara, she happens to be a "3 of diamonds" (which is also the rough translation of the word "mitsubishi") and, similar to diamond-type Trumparts, she isn't really a fighter so to speak, but more of a scheming and stealthy tactician/trap-maker/prankster.
It is generally the job of a diamond-Trumpart to stay behind the lines most of the time, thinking of new traps, riddles and strange occurences within Wonderland that, for the majority of cases, are meant to entertain the queen of hearts.