There are many anime characters whose birthdays are on the 9th or 12th:
1. Miamori () Tomori () of the Light Sound Girls
Yoshitou from the Death Note
3. Kimki Ken of the Tokyo Ghouls ()
4th Middle School Idiots also want to fall in love! Miyuki Shinohara ()
5. Atobe Keigo of the Prince of tennis
6. Alan Yaeger of the Attacking Giants
7. Tanjiro of the Blade of Ghost Destruction
Naruto Uzumaki from Naruto
Of course, this was only a small portion of them. There were many other anime characters whose birthdays were on the 9th and 12th.
There are many characters in Detective Conan who have birthdays. Here are some of the known birthdays:
1 Kogoro: January 3, 1889
Conan: April 17, 1896
3rd time: October 10, 1909
4. Mitsuhiko: February 23, 1912
5. Sorrow: December 7, 1992
6 Concubine Yingli: March 5, 1965
7 Kudo Shinichi: March 31, 1879
8 Maori Kogoro: November 22, 1896
9. Ai Haigahara: December 7, 1900
Miwako Sato: December 31, 1970
11 Mota Kojima: February 19, 1994
12 Far Mountains and Leaves: December 13, 1982
13 Yamato Kansuke: March 19, 1908
14. Kyoko Sakura: December 23, 1989
Takagi Wataru: December 13, 1991
These are only some of the characters whose birthdays are known. In fact, there are still many characters in Detective Conan who have birthdays that can be discovered continuously.
Well, for their children's birthdays, they'd start the day with a family-only celebration at home. Hinata would give the child a handmade gift, something with deep emotional value. Then, in the evening, they'd have a party in the village square. Naruto would make a big speech about how proud he is of his child, and all the villagers would come to join in the celebration, bringing gifts and well - wishes.
There were many characters in Naruto whose birthdays and ages were fictional and untrustworthy. These birth dates and ages were all created by Kishimoto to construct the Naruto world. Although the birthdays and ages of these characters might seem strange, they were not real characters, but fictional characters created by Kishimoto.
For example, many of the ninjas in Naruto were born in winter because Kishimoto imagined that people would be calmer and easier to fight ninjas in winter. However, this was not the truth, but Kishimoto's creation.
Many of Naruto's characters 'birthdays and ages were fictional and not based on real people or events.
On one son's birthday, the mom gave him a locket that had a picture of them together when he was a baby. It was a very emotional moment as it showed the deep connection between them. He wore it every day after that.
There was a son who always wanted a dog. On his birthday, his mom surprised him with a puppy. The mom had secretly been preparing for weeks, getting all the necessary supplies. The son was overjoyed and spent the whole day playing with his new furry friend. It was a birthday he would never forget.
One way to do it is to consider the story's setting and the cultural or seasonal background. You could also link it to their zodiac sign to add depth to their character. Another approach is to make the birthday related to a key plot point or a turning point in their development.
One Piece was a very famous anime with many characters. The following are the birthdays of all the characters in One Piece:
Monkey D Luffy (February 7, 1975)
2 Monkey D Ross (May 5, 1975)
3 Usopp (22 November 1972-)
4 Sanji (17 April 1972-)
Chopper (14 November 1972-)
6. Nami (19 March 1978-)
7 Nico Robin (June 28, 1974)
Franky (January 18, 1971)
Brook (18 June 1974)
Zephyr (11 May 1970-)
These are the birthdays of all the characters in One Piece. I hope they will be helpful to you!
One interesting aspect could be fanfictions that explore the friendship between the characters more deeply. Maybe there are some that focus on the adventures they could have had outside of the main story events.