Complex sentence: But shows his true colors when Mari looses in the Grand Prix, though he shows great interest in Ichigo and Tennouji as pâtissieres and seems to favor both of them among all his students.
Split into simpler sentences: But shows his true colors when Mari looses in the Grand Prix. Though he shows great interest in Ichigo and Tennouji as pâtissieres and seems to favor both of them among all his students.