"A demon of disease that lives in the underworld in Nepali folklore. It appears at a crossroads, but if you make an offering and chant a mantra, it will defend you from sickness. He is also Shiva and Kali's personal attendant. There is a Nepali festival where Kwancha appears among other gods."
—Shin Megami Tensei: Strange Journey Compendium
Kwancha appears at the top of Sector Eridanus as one of five demons supplying infinite life to Ouroboros. The player must defeat it (along with the others) to cut off the energy flow and make Ouroboros vulnerable.