Thread:Digi/@comment-25083716-20140620042408/@comment-1352718-20140620055728

Because Garren isn't the Secondary Rider of the show. Like Leangle, he's an extra rider or supporting rider. Chalice was considered the Secondary Rider due to his status as Kazuma's rival and long time friend. Also Tertiary Riders doesn't exist anymore, it's been replaced with Supporting Riders and Extra Riders.