Sources for Character Ages in Magia Record

Iroha Tamaki

Age: 15 (confirmed)
Grade: Middle 3 (confirmed)

The Magia Archive vol.1 lists Iroha as 15, Middle 3. That being said, Iroha already had two birthdays in the game - the first in The Crescent Moon Manor's Summer Vacation, the second in Arc 2's epilogue. Therefore, she may be older.

Yachiyo Nanami

Age: 19/20 (confirmed)
Grade: University 1 (confirmed)

The Magia Archive vol.1 lists Yachiyo as 19, first year in university. That being said, Yachiyo's Haregi Costume's story mentions she is 20, and in Tanabata ver.'s Magical Girl Story, Iroha says Yachiyo is an adult (the age of majority used to be 20 in Japan until 2023). Additionally, she was 12 during the events of Deliver to the Beyond, A Piece of Hope.

Tsuruno Yui

Age: 17 (confirmed)
Grade: High 2 (confirmed)

The Magia Archive vol.1 lists Tsuruno as 17, and a high school 2nd year student.

Sana Futaba

Age: 14 (confirmed)
Grade: Middle 2 (confirmed)

The Magia Archive vol.1 lists Sana as 14, and a middle school 2nd year student.

Felicia Mitsuki

Age: 13 (confirmed)
Grade: Middle 1 (confirmed)

The Magia Archive vol.1 lists Felicia as 13, and a middle school 1st year student.

Mifuyu Azusa

Age: 19 (confirmed)
Grade: University (exact grade unknown)

The Magia Archive vol.2 lists Mifuyu as 19. Certain stories mention she is a university student [CITATION NEEDED]. Additionally, she was 12 the events of Deliver to the Beyond, A Piece of Hope.

Touka Satomi

Age: 11 (confirmed)
Grade: Elementary 5 (confirmed)

The Magia Archive vol.2 lists Touka as 11, and an elementary school 5th year student. Despite that, she also discusses cosmology with professors in universities, based on One Fleeting Summer Night. In the Cherry Blossom Dreams event, she mentions she is 12.