Tenkai Nankado

Tenkai Nankado 1st appeared in Onimusha Down of Dreams.

Samurai Warriors
In Samurai Warriors 2 Tenkai appeares as a hired bodyguard. His appearence is that of a monk.

Onimusha
Tenkai wields spears. His attack is quite slow and meant for fighting individual enemies. When you first have to fight him on normal mode and harder, he proves annoying to fight due to his use of ice oni magic. When he fights Mitsunari Ishida he wears a red mask. Avoid this by pressing L1 and the left analog stick backwards to avoid being frozen and then attacked repetitively. If you are to fight in a land where character skills are not needed, it is recommended to chose Tenkai due to his special ability 'pray', which enhances Soki's strength.

Nobunaga's Ambition
In Nobunaga's Ambition Iron Triangle he is with the Akechi clan in the Like a Dream scenero.

History
Tenkai (天海, Tenkai?, 1536 – 1643) was a Japanese Tendai Buddhist monk of the Azuchi-Momoyama and early Edo periods. He achieved the rank of Daisōjō, the highest rank of the priesthood. His Buddhist name was first Zuifū (随風?), which he changed to Tenkai in 1590. Also known as Nankōbō Tenkai (南光坊 天海?), he died in 1643, and was granted the posthumous title of Jigen Daishi (慈眼大師?) in 1648.

Tenkai was at Kita-in (then written 北院) in Kawagoe in 1588, and became abbot in 1599. He was on the staff of Tokugawa Ieyasu, and served as a liaison between the Tokugawa Shogunate and the Imperial Court in Kyoto. One of his projects was the rebuilding of Enryaku-ji, which had been devastated by Oda Nobunaga. He also revitalized Kita-in, and changed the characters of its name to 喜多院. Nearing death in 1616, Ieyasu entrusted Tenkai with his last will regarding matters of his funeral and his posthumous name. Tenkai selected gongen rather than myōjin, and after death Ieyasu became known as Tōshō Daigongen. Tenkai continued to serve as a consultant to the next two Tokugawa shoguns. In 1624, retired shogun Tokugawa Hidetada and ruling shogun Tokugawa Iemitsu asked him to establish Kan'ei-ji, a Buddhist temple to the northeast of Edo Castle in Ueno.

There are several theories concerning his early life. Some fiction writers postulate that he was in actuality Akechi Mitsuhide. It is not certain whether Mitsuhide died at the Battle of Yamazaki or not, and some suppose that he survived and began a new life as the priest Tenkai.