Kawai Kawai appears across multiple installments of the Iczer franchise, evolving from her debut in the OVA *Adventure! Iczer-3* to her significant role in the subsequent *Iczer Girl Iczelion* OVA and its radio drama adaptation.

Initially introduced as Kawai Shizuka in *Adventure! Iczer-3*, she works alongside Nagisa Kasumi at a lunar colony fast-food delivery service. She survives an alien attack and later joins the crew of the spacecraft Queen Fuji. Kawai exhibits tenderness, a pronounced fear of insects, and deep concern for her parents on Earth.

In *Iczer Girl Iczelion*, Kawai steps into the role of Silver Iczelion (シルバーイクセリオン), bonding with an Iczel unit to form battle armor. Now a high school student defending Earth, she distinguishes herself through a calm, gentle demeanor and unwavering commitment. She takes initiative, explaining the Iczels' origins as technology created by the Iczer race to empower defenders and successfully recruiting protagonist Nagisa Kai. Her combat abilities include deploying Beam Boomerangs, utilizing barriers, and accessing Burst Teleport Mode for rapid evasion.

The *Iczelion* radio drama bridges her appearances, depicting her prior connection to Nagisa Kasumi from *Iczer-3*. Within this drama, she inherits the Silver Iczelion mantle directly, reinforcing her dedication to protecting Earth. It also reveals a developing romantic relationship with Yajin Ro, a character from *Iczer-3*, during the *Iczelion* events.