The protagonist of [i][[Rumble Roses]][/i]. Voiced by [[Hidaka Noriko]]. Her Heel version is [[Rowdy Reiko]].

Reiko enters the Rumble Roses tournament after her mother and sister disappear.

Reiko has [[short hair|short]] [[brown hair]], [[brown eyes]], and [[medium breasts]], the left one having a [[mole on breast|mole]]. Her wrestling outfit consists of a [[red choker]] (sometimes a [[red scarf|scarf]] in illustrations), a [[red bikini]] top, [[red gloves|red]] [[fingerless gloves]], [[red shorts|red]] [[short shorts]], and [[red footwear|red]] [[knee boots]] that are [[cross-laced footwear|cross-laced]]. Her shorts are [[open fly|unzipped]], revealing her [[white panties]].

The first kanji on Reiko's name, "零", means "zero", which is alluded in her outfit, as both her panties and bikini top have the word "Zero" on them.

When fighting in a [[swimsuit]], she wears a [[front-tie bikini top|front]] and [[side-tie bikini bottom|side-tie]] [[polka dot bikini|polka-dotted]] [[white bikini]] and [[white footwear|white]] [[high heels]].
日ノ本零子