- Gender: Male
- Age: Mid-40s
- Hair: Black
- Eyes: Brown
- Nationality: Japanese
- From the manga Ranma 1/2, by Rumiko Takahashi
- First Appearance: Chapter 1
The patriarch of the Tendo household, widower, and father of three teenage daughters. Soun is a martial artist and old training partner and friend of Genma Saotome, dating back to before their children were born and both of them served under the perverted old martial arts master Happousai. Tired of Happousai’s constant abuse, Genma and Soun conspired to get the old man liquored up, and when he was asleep, sealed him in a cave (with a liberal application of dynamite) somewhere in the Japanese countryside. Afterwards, the two friends joyously promised that one day, two of their children would marry and inherit the Tendo Dojo, thus uniting their two schools of martial arts.
Soun is a wishy-washy and overly emotional man, who does try to do his best by his children, but is easily swayed or outright intimidated into quavering submission. It is never seen exactly how powerful he is as a martial artist, but since he has “settled down” and been raising a family for over ten years, it is safe to say he is no longer as strong as his old friend Genma, who spent that time on a training trip.