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The Witch of Symbols (?????) is a currently unknown witch from the mobile game Magia Record. Currently in-game, its existence is only known through it's familiars, the Echos.

In the anime for Magia Record, a large Familiar with a green hue was seen within the Symbol Witch's barrier. Upon its defeat, the barrier disappeared. This is most likely the final form of the familiars as they grow through the different stages.

Minions

人間から奪った生命力に応じ成長する姿を変えると言われる象徴の魔女の手下達の中で、イス憑きと呼ばれる種類他魔女の手下に比べごく僅かな愉力を元に樣々な姿へと何段階も成長する。繁殖そのものを目的としており、ある程度成長した者は魔女にならずとも自身で新しい手下を産み落とすことが出来る。椅子を形どり、その利便性と完成されたフォルムを噛みしめて成長している模様。

Echo
Runes	ECHO
Type	Symbol witch's minion I-IV
Duty	Proliferate
Episodes	Magia Record, MagiReco Episode 6

Minions of the witch of symbols. Their role is to proliferate. These Familiars of the Symbol Witch are called Haunting Chairs. They grow and transform by absorbing vital energy from humans. Compared to other Familiars they can change shape with a small amount of vital energy. Their primary goal is reproduction. Once they have grown enough, they can produce other Familiars, despite not being Witches. They grow, thoroughly enjoying the convenience and completeness of their forms.