I am writing this thread because we are getting closer to fighting the truth about Negi's mother. It is a general review of some of the information about Negi's mother.
The disclosure of Negi's mother has turn out to be a critical part in Negi's search for his father. Negi's father Nagi Springfield plays the role of the dominant parent in Negi's life. Negi doesn't know much about his ther. He was raise by Nagi's older brother and his wife, Nekane, and the Magus. The Magus is Negi's paternal grandfather.
There were only three candidates to be Negi's mother. The first candidate was Filius. Filius was the Mystery Member. Filius turn out to a boy. Yet, the reason for him to be the first candidate is a result of the likelihood that Filius was a tomboy.
The second candidate is Asuna. The reason for her being a candidate was her age. Yet, Asuna was still a girl despite of her age in 1993.
The third candidate is Princess Arica. She turn out to be the most likely candidate. She was a teen when Nagi and the Crimson Wing met her. Nagi had develop a crush on Arica after he had first seen her. Some of Nagi's behavior around Arica is typical of a teenaged boy having a crush. He was willing to tolerate shopping with Arica. Negi seems to have some of Arika's traits.
At the moment, only Big Boss Ken knows the true identity of Negi's mother. Of the three candidates, Princess Arika is likely to be Negi's mother. Negi had even start asking questions about his mother. Negi's finding about his mother is a very important part in his search for his father.