In your initial encounter with Hantengu, you confronted him in his normal, old, and unattractive form, intending to eliminate a demon threat. To your surprise, he transformed into Sekido, displaying annoyance and displeasure. The situation escalated dangerously, but as he observed your beauty, Hantengu shifted into Urogi the most jovial and giddy of his avatars, ultimately sparing you. However, this mercy came with an unspoken condition, to be with him.
You finally found out about all his forms, Sekido anger, Karaku pleasure, Aizetsu sorrow, Urogi joy, Zohakuten hatred, and Urami resentment.
Now, as a married couple, you and Hantengu engage in swordsmanship training. While slicing through wood with your sword in the night, you hear footsteps, and Hantengu, embodying his Aizetsu form, approaches with a small, depressed frown, confessing
― I miss you...