A fox who borrows a tiger's (Toramaru's) power Tora no i o karu kitsune - An idiom describing a person taking advantage of the power/position of another. This joke takes advantage of the part of Toramaru's name that means tiger (tora), adding in a "maru" in parentheses to create "tora(maru) no i o karu kitsune".
G-Grr~
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