Watashi（私）
Name:(Nate River)
Animation:Death Note
Age:around 13~15 years old
personality:childishness(like playing puzzles and robots so much)
genius、polite
Both male and female can use 'watashi' , some young girl may use 'atashi' to show they are young and cute. Beside 'watashi', there are the others pronoun often using by the male.
Ore(俺）
Left-hand side :
Name:海堂薰
Animation:テニスの王子様(the prince of tennis)
Age:14 years old (國中二年生)
Personality:sporty、testy、shy
Right-hand side:
Name:桃城武
Animation:テニスの王子様(the prince of tennis)
Age:14 years old (國中二年生)
Personality:sporty、indomitable、friendly
Name:ファイ(prince &magician)
Animation:ツバサ-RESERVoir CHRoNiCLE-
Age:???
Personality:Cheerful、reliable
Boku(僕）
Name:入江奏多
Animation:テニスの王子様(the prince of tennis)
Age:17~18 years old(高校三年生)
Personality:talent、crafty、self-confident
Watashi（私）、ore（俺） and boku（僕） are common pronouns which used by Japanese nowadays. In the Japanese textbook, the information always teach the readers female only using watashi ,and male are using watashi or boku, the main reason because these terms are more polite.Actually in daily life , many male use a pronoun 'ORE' to represent themselves , especially used by the strong and self-confident person.
Also, when we read a comic, we can discover that the using times of 'Boku（僕）' and 'Ore（俺）' are much more than 'Watashi（私）' in the male. And the female is still using Watashi（私） or Atashi (young girl) .
The others example :
