I am reminded of the Caucasian 'skirted' shashkas which have their hilts deeply canted in this fashion. It has been some time so cannot recall exact classification on these, and it seems that it was suggested then, just as Martin has noted, that perhaps this might have some effect on force to cut.
While I remain unclear on those dynamics, Olivers suggestion on this character assisting in wearing or grip seems plausible. Totally agree on the green jeweled example, the hilt appears bent over as noted.
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