Japanese uses three character sets: Hiragana and Katakana, both native, and Kanji, the Chinese character set, which is much more geometric in appearance.

One authority states 50,004 characters for Kanji. Hiragana and Katakana can be researched from Wikipedia.

Hello Kitty is a Japanese character because she was produced by the Japanese company Sanrio who continues to market the character to this day.

The character used in Japanese to represent "cloud", as in Chinese, is 雲, pronounced kumo.

The Japanese character for male is 男 and the character for female is 女.

No, there is not. The Japanese R-like consonant is a cross between an R and an L.