A Certain Knowledgeable Wiki [Code Vader/Unknown Actor] (Wiki)

Mikoto Yoshikage

Personal Info

Status: Unknown

Age: (Unknown)

Gender: Female

Family
• Garon Yoshikage (Husband/Deceased)
• Zack Yoshikage (Son/Alive)

Professional

Occupation
"Unknown" (possibly a magician)

Media
"Appears in fanfic" (technically not official)

Debuts

Fanfic - [Unknown Actor - Chapter 1 (reference)]

"Mikoto Yoshikage is a recurring character of Toaru Wakaranai no Actor (A Certain Unknown Actor) only being mention. She is the mother of Zack Yoshikage & wife of Garon Yoshikage.

Trivia
• It is hinted that Mikoto has relations to Index Prohibitum as Index comments to Zack due to his last name. This comment hint applies Mikoto Yoshikage has tides to the magic side. Because this comment is said after meeting Touma it can apply that this encounter is around the index arc since Index memory has been erase countless times before Touma intervene or that Mikoto has some mysterious connection tides to the 103,000 magical grimoires. 
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Personally
Being mention only nothing about Mikoto is currently known expect Index mention.

Relationships

Index Librorum Prohibitum
When Index meets Zack, Index comments on Mikoto existence surprised of the idea Zack is relate even being her son no less.

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Chronology

(A Certain Unknown Actor)
"Mikoto is first mention when Zack meets Index, being surprise that he was relate to her even being her son no less confirming she knows her personally.
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Quotes

"TBC (will be Updated soon)"