Midfielder Michel has left Birmingham to join Spanish Primera Division side Getafe for an undisclosed fee.
The 25-year-old Spaniard, who joined Blues from Sporting Gijon in January 2010, leaves St Andrew's after making just 12 appearances, with half of those coming from the bench.
A club statement read: "Blues would like to thank Michel for his time at the club and wish him well for the future."
He spent time on loan at Greek side AEK Athens last season.
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