Her powers included running after the player, staying cloaked to attack, and draining health from the player to recover her own. She was never released but her character was to be Kevin's wife.

A Matriarch was actually created for the fan made KFMod 2.6+.

Her introduction may have been delayed due to her 'true form' mode being scrapped. Much like many features leaked during that time, she was planned in advance.

The evidence of the Matriarch's existence was discovered in the trader's voice file ever since Killing Floor 2 was released in Early Access.Matriarch was originally thought to be Kevin Clamely's wife but it was revealed to be his daughter Rachel.Matriarch is the first female boss in the Killing Floor series.Twisted Christmas: Head Seemingly burnt or rotting in appearance with mech suit and rest of organic body made of ice (Likely intended to be the abominable snowman).Halloween Horrors: Giant pumpkin monster: body made of bark and stems with jack o lantern face and orange organic skin with glowing mouth.Summer Sideshow: Steampunk armor with 4 yellow lights instead of the traditional grate on the mask with black and red skin.If the cannon is destroyed, she will gain a grappling attack similar to the Patriarch's with her oversized left hand, will move faster, and begin using the claws on her right arm to damage you. Throughout the fight, the only ZEDs that will attack the player are the E.D.A.R. Upon destruction of the face guard, she will take more damage from that area. The Matriarch pilots a giant mech suit with 2 destroyable parts, the face guard, and the cannon on her left arm.

Scrake killing floor 2 unkillable