Ryuunosuke Fujinami	Ranma Saotome
The most powerful martial artist in a show with a few fighters among the cast.	The most powerful martial artist in a show where everyone is a martial artist.
Huge gender identity crisis. Cursed with conditioned male pattern behaviour. More than anything wants to become feminine but her male tendencies are so much a part of her that it is impossible.	Huge gender identity crisis. Cursed with turning into a girl everytime he's doused with cold water. More than anything he wants to be a normal man again. But his every chance at lifting the curse is foiled so he's stuck as a boy/girl.
All the girls who think she's a guy want to date Ryuunosuke. The guys who know she's female keep trying to take advantage of her but always end up getting clobbered. Either way, she's not interested in the guys or the girls.	All of the girls want to date Ranma. While in his female form, guys try to take advantage of him but are always end up getting clobbered. Either way, he's not interested in dating.
Ryuu and her father are always fighting each other. Thier brawls usually surround the subject of Ryuu inheriting Hamajaya, her desceased mother or the issue of Ryuu's gender.	Ranma and his father Genma often fight each other. Their brawls usually surround the subject of Ranma inheriting the Tendo Dojo, his estranged mother or the issue of Ranma's gender.
Ryuunosuke's father... insensitive obnoxious overbearing male chauvanist a self-trained martial artist troublemaker ignorant has creepy stoic eyes that always bear an expression of boredom often overemotional raised his child on his own possibly the worst father of all time could be Mr. Saotome's long-lost brother	Ranma's father... insensitive obnoxious overbearing male chauvanist a trained martial artist troublemaker ignorant has creepy stoic eyes that always bear an expression of boredom often overemotional raised his child on his own possibly the second worst father of all time could be Mr. Fujinami's long-lost brother
Ryuu's father often forces Ryuunosuke to undergo stupid and unecessary training in martial-arts, among other things. All of which serve to make her more manly. But often there's an alterior motive rooted in his own greed or laziness.	Genma forces Ranma to undergo stupid and dangerous martial-arts training to make Ranma into a true martial artist. But often there's an alterior motive rooted in Genma's own laziness or gluttony.
Her father wants Ryuunosuke to become a real man's man, so that she can inherit the family tea shop. The fact that she's a girl kind of gets in the way of his plans. But he doesn't let that stop him.	Genma wants Ranma to become a real man's man so that he can inherit the Tendo Dojo, but mostly so that his wife doesn't make him commit seppuku. The fact that he transforms into a girl kind of hinders the likelyhood of that plan working out.
Mr. Fujinami has forced Ryuunosuke to get engaged to the son of his best friend. Now engaged against her will to Nagisa, a guy who is completely girlish.	Mr. Saotome has forced Ranma to get engaged to the daughter of his best friend Soun Tendo. Now engaged against his will to Akane, a sweet yet tempermental girl.
Ryuunosuke's mother died when she was only a baby so she had to grow up without a mother.	Ranma's father took him away for martial arts training when he was just a baby so Ranma had to grow up without a mother.

While most of the similarities lie with Ranma, there is also a lot in common between Ryuunosuke and another character in Ranma 1/2, Ukyou Kuonji.