This information belongs to RFyle11 20:22, April 16, 2011 (UTC)
A female Kamen Rider has appeared to help Den O and the other riders. She had a Imagin Partner, motif is a Phoenix.
Her name is Mariko. Her story can be she’s a cousin of Ryutaro or a long lost sister, niece? Her Female Den O Phoenix form is similar to Den O’s Wing Form and her armour is Gold and tracksuit is black . Her weapon is a staff. She and Kotaro teamed up to take down the dark alliance and travelled into the present to warn Ryutaro, Yutto and other others about the danger.