So that you have a clear picture and without cartoonish exaggerations, here is the official and detailed physical description of the leaders and key characters of that second season (Shinovi Master).
The character design in Senran Kagura (by Nan Yaegashi) plays a lot with contrasts: while some have an imposing and mature design, others reflect gothic, traditional or more youthful styles.
1. Gessen Academy (The leading role of the season)
Yumi: It's the center of attention this season. She has long, straight, silvery-white (or very light blue) hair that she usually wears down or with a small traditional decoration. His eyes are an icy blue and his skin is extremely pale. His usual clothing and transformation suit are inspired by a modified traditional Japanese kimono, in shades of white and blue, and he always fights using ice fans. He has a slim but very gifted physical build, with an average-high height for the group.
Shiki: Completely gal or gyaru aesthetic. She has long, curly, bright blonde hair, large eyes, and often wears makeup or trendy accessories. Her figure is one of the most voluptuous in the group, and she dresses in very tight, urban-style clothing.
Minori: She is the smallest in the group in both height and features. She has a childlike appearance, with bubblegum pink hair styled in two short pigtails and large eyes of the same color. Her clothing is buff and colorful.
2. Hanzo Academy (The Classic Protagonists)
Asuka: She has the appearance of a classic shonen anime heroine. Her hair is medium-length and brown, and she wears it in a high ponytail. Her eyes are large, expressive, and brown. Physically, she is of average height with an athletic and well-proportioned build. She wears the standard school uniform (sailor uniform), and when transformed, she wears a distinctive red scarf and wields two short swords.
Ikaruga: The tallest and most elegant of her group. She has very long, straight, bluish-black hair with straight bangs. Her eyes are sharp and dark. Her physique is slender, elegant, and her posture is perfect, reflecting her noble upbringing.
Katsuragi: Physically imposing due to his height and demeanor. He has long, messy blond hair and blue eyes. His build is very athletic (he fights using heavy boots for kicks). His school uniform is always noticeably unbuttoned.
Yagyuu: He has a more somber appearance. He is short, with short, messy silver/gray hair. His most distinctive feature is an eyepatch over his right eye. He usually wears a dark coat and carries an umbrella that he uses as a weapon.
Hibari: Very cute and youthful-looking. She has short, curly, light pink hair and large, bright eyes. She is short and has a slender build.
Homura: He has a rough and wild appearance. Her hair is jet black, long, and tied back in a high ponytail with strands framing her face. Her eyes are a deep reddish-brown. Physically, she is of medium-tall height, with a very wiry and athletic build. She is notable for her battle scars (which are sometimes accentuated in her transformations) and for wielding six katanas at once.
Yomi (Hebijo/Homura): (Not to be confused with Yumi). She has long, straight, dark green hair and green eyes. She is tall and slender. Her design is elegant; she usually wears Victorian or formal attire and has a physical obsession with bean sprouts, which is the subject of jokes about her figure.
Hikage: Her physical appearance screams "disinterest." She has short, dull orange or copper-colored hair and lackluster eyes. Her face almost never shows any expression. Physically, she is slender and agile, and usually wears a simple white shirt and dark pants.
Mirai: She's the shortest member of the squad. She has short brown hair, wears glasses, and a flat cap. Her petite frame is flat and slight, which causes her constant insecurities in front of the others.
Haruka: She has the appearance of a "mad scientist" or femme fatale. She has long, dark purple hair and eyes of the same shade. She's tall, with deliberate movements and very pronounced curves. She usually wears a lab coat over rather revealing clothing.
4. Antagonists of the Second Season (Fûga)
Fubuki: She's visually imposing and shares the same trait: she has very long, pure white hair and very deep, piercing blue eyes. Her skin is extremely pale. She wears a military-style uniform or long white coat with gold and dark details that denote authority. She has a mature, tall physique and a cold aura.
Gekkou: Una de las gemelas sirvientas. Tiene el cabello de un color verde menta claro, recogido en peinados elaborados (estilo odango o moños). Viste un uniforme de sirvienta modificado para el combate en tonos oscuros. Físicamente es de estatura media y complexión esbelta.
Senkou: La otra gemela. Físicamente idéntica en rostro y cuerpo a Gekkou, pero se diferencia porque su cabello es de un color rubio pálido o platino y su actitud en el rostro suele ser más agresiva o afilada en comparación con la sonrisa burlona de su hermana.