Shizuka Masou

Profile
A powerful magic user. She is currently seeking for her father's enemy, Chenezale do Ragarl for revenge.

One of her interests is magic research.

Rance 2
She is one of the Four Witches of Custom and is heavily implied to be its leader, specializing in Fire Magics (or more precisely, offensive magics).

She holds a major role in the story as she is always mentioned by the other witches and also the last witch for Rance to "save". It's unclear whether she is truly possessed by the ring's power as well as the other three, since she looks conscious enough when Rance confronts her for the first time, to stop her from altering history.

She participates in the last battle along with Rance and Sill,

Kichikuou Rance

 * She join along with Maria, Mily , Mile and Ran after Rance conquered Custard town.

Rance 6
After meeting Rance and Sill inside Zeth's national Museum, Shizuka (and Maria, with whom she was visiting the Museum at the time) see themselves forced to take part in the resistence movement of Iceflame, of which Rance and Sill were part of then.

First unwillingly Shizuka helps the group but after some time she decides to use the Information net in order to find her Father's murderer, Chenezale do Ragarl.

She finds out that Ragarl is in fact in Zeth, in one of the Towers of the four heavenly Emperors. Nagi's tower to be more exact. In there she discovers that she is actually Nagi's half sister, who due to jeaoulosy towards Shizuka and unrequited love of her father (not entirely the regular father-daughter kind of love), Ragarl, is holding him captive in a glass container and with half of his body gone.

Shizuka loses to Nagi and is tortured by her little sister for some time until Rance arrives to her rescue. Once Nagi is defeated and Ragarl is dead, Shizuka helps the protagonists to fight against Camila's demon army... But not before Rance has his way with Shizuka after a long time, as a "reward" for helping her.

Mamanyonyo
She was summoned as a hero

Sengoku Rance
She appears along with Maria as foreign allies when playing Sengoku Rance the second time (Only if user choose special character bonus at the start and have installed patch 1.04).