noun
onee-kei gyaru; older-sister-style gyaru
A gyaru substyle from the late 2000s–2010s, characterized by brown hair, deep tans, and expensive brand-name clothing and accessories. The look is more mature and glamorous than typical gyaru, hence the 'older sister' image.
お姉系ギャルは、高級ブランドの服やアクセサリーを好む。
Onee-kei gyaru favor high-end brand-name clothes and accessories.
彼女はお姉系ギャル雑誌をよく読んでいる。
She often reads onee-kei gyaru magazines.
General term for a young woman following trendy, often flashy fashion; お姉系ギャル is a specific mature, glamorous substyle.
Similar concept but uses the reading あね; お姉系ギャル is the more common term for this substyle.
From お姉 (onee, 'older sister') + 系 (kei, 'style/type') + ギャル (gyaru, 'gal'), referring to a more mature, sophisticated gyaru look.