Milli Yorks

Mill's older sister. Milli appears as a tough warrior and glamor girl in daily-basis, but she also can be quite affectionate at times, especially when it comes to her sister, Mill, to the extent that she dares to enter a dangerous labyrinth just for her.

Unfortunately, she died at the age of 23.

Rance 2
Milli goes to the labyrinth to save her sister, Mill, who is currently possessed by the ring's power. Unfortunately, her party got wiped by Green Hannies and leave her as the only survivor in which she must keep fighthing to survive. Rance saved her just when she is about to lose. With her purpose still has yet to be fulfilled, Milli joins Rance's group mainly because she believed hers and Rance's motive are (about) the same.

With her phantom beasts, Mill is literally untouchable. According to a certain mummy, special sword is needed to slice through them. The sword itself is protected by a Golden Hanny, and is very strong. After defeating it, Milly obtained the special sword (which apparently only can be held by females). With the sword equipped, she can slice through Mill's phantom beasts to ensure their win. Mill, who cannot accept her defeat, still trying to resist, Rance, who doesn't want to extend the fight any longer is suddenly threatening Milli with his sword, using her as a hostage to soften Mill and force her to just give up peacefully so he can just do his "job". Eventually, his plan succeed, and Mill is free from ring's possession.

Mill and Milli run a pharmacy in Custom, and the people seem to already forgive Mill since they have accepted her as one of them.

In the last chapter of story, Milli partakes in battle against Ragithis who just regained the ring's full powers, though beaten and is forced to retreat along with the rest of group.

Rance 3
Milli fought as part of Custom Defense Force against the invasion from Helman. With Rance on Custom's side, they fought together against enemy that had the advantage in strength, and still won in the end. After that battle, she fought again with the Helman army as the Liberation Army of Leazas.

Although she did help to defend Custom and free Leazas, she also made a lot of mistakes during several battles, in which Rance is very concerned with. Mill said that her sister's condition is just not at its best recently.

She took medicines made by priestess Cell. As for what her disease is, it never really stated.

Kichikuou Rance
She joins along with Mill, Shizuka, Maria, and Ran after Rance conquered Custard town.

Rance Quest
She is already dead by the time of the events of Rance Quest. When Mill Yorks joins Rance's party, Milli's photo can be seen equipped on her which she keeps as a memorial. It mentions her age at the time of demise as 23 years.