The Boku wa Tomodachi ga Sukunai - Kashiwazaki Sena - 1/5 Swimsuit Ver. figure by S-Mist presents a commanding, summery interpretation of Sena Kashiwazaki. The figure captures her signature long hair swept with careful strands that frame her face, and a poised, confident stance that hints at her playful, outspoken personality. She is depicted in a swimsuit variant, with meticulous sculpting on the torso, limbs, and subtle details like the neckline and swimsuit seams. The base is designed to complement a beach-themed display, while the overall finish emphasizes smooth skin tones and glossy accents that bring life to the character. Fine molding and paint application enhance the sense of presence on the shelf.

Kashiwazaki Sena is one of the central heroines of Boku wa Tomodachi ga Sukunai. Charismatic, intelligent, and extraordinarily popular, she serves as the confident president of the school's Neighbors' Club. Beneath her outward charm lies a playful, sometimes tsundere personality and a genuine curiosity about her classmates, especially Kodaka Hasegawa. Sena’s interactions with the other members of the Neighbors' Club drive many scenes, blending humor with moments of vulnerability. Her backstory and attitude reveal a strong-willed, loyal friend who desires closeness and meaning in friendship and romance, while navigating the awkward dynamics of adolescence and social status.