The ability of the wild card is to get a person's power be it magic or an esper ability it doesn't matter
The concept of the name unknown actor is based off under night in birth specifically Hyde Kido
Anna Zetsubou original look was going to be Midori from black bullet this is also mentioned as the fact that her power is so great she was sent away from her village after her parents were killed and that Garon found her and brought her to academy city (it will be told in the next chapter)
Zack's ability comes from the eyes this could be made that Viperslim90 was a fan of naruto (the power came from the eyes in that show) but now it is an interpretation that he is a fan of Charlotte specifically Yu Otosaka
The name Garon Yoshikage is the name viperslim90 made for Zack's father this could be seen that he loved Fire Emblem Fates the mother's name is also a reference to Fire emblem fates