Inspired by the original singh rager from 3e D&D Oriental Adventures this is a hengeyokai only barbarian primal path – something unusual in 5e D&D. It emphasis the combat abilities of the hybrid form of the hengeyokai just like the Nine-Tails feat emphasis the combat proves of the animal form. But this is much more of a commitment to the idea than the feat is. This is just a guide, the primal path can be modified to reflect the character of the animal taking the class. This one uses the lion as the base animal.
Komainu ragers draw their furious strength from the noble lion (called a singh or singha in some societies). The komainu ragers’ fury never robs them of their discipline and control, which to many minds makes them only more terrifying. They are paragons of warrior virtue whose speed, strength, and courage are unrivaled.
You give a blood curdling roar as a bonus action. All enemies within 20 ft radius of you must make a Wisdom saving throw, On a failed save, it is frightened of you for 1 minute. The affected creatures may attempt another save to break the affect at the end of their turn. You may make 1 roar for each Charisma ability bonus you have per day. You
At 3rd level, your hybrid form becomes much more effective in combat. You gain the secondary attack of your animal form (for example the lion rager would gain a bite and claw attack). Additionally each time your proficiency bonus increases you may increase the damage of die of your natural weapons by 1 die to a maximum of d10 – d4 becomes d6, d6 becomes d8, d8 becomes d10.
At 6th level you become immune to fear.
Beginning at 6th level your speed becomes 50 feet (or gain +10 feet to your movement – whichever is higher), your natural attacks are now magical and you gain the keen smell, running leap and pack tactics trait (see the Lion animal entry in the MM).
Starting at 14th level, a komainu rager can act as if under the effects of a haste spell for a total of 1 round per level per day. These rounds need not be consecutive.