PenPen is depicted as a compact penguin figure with the classic black-and-white plumage and a glossy finish on the body, paired with a slightly softer matte coating on the base to emphasize contrast. The beak and feet are painted a bright orange, and the eyes have a subtle gloss to bring life to the character. The wings hug the sides of the body in a relaxed pose that conveys PenPen's easygoing personality. A small display base evokes a minimal scene inspired by Evangelion Shin Gekijouban, providing stability while keeping the character visually prominent. The overall look captures PenPen's charming, playful essence faithful to the source material.

PenPen serves as the light-hearted resident penguin of NERV, bringing a touch of domestic whimsy to the otherwise tense world of Evangelion. In Evangelion Shin Gekijouban, he continues to appear in casual moments that contrast with the pilots' battles, offering humorous commentary and endearing quirks that remind viewers there are ordinary, human moments even amid extraordinary events. PenPen's presence highlights the bonds among staff and pilots, often acting as a nonchalant observer who inadvertently illuminates emotional beats and friendships. His gentle charm provides emotional relief and a softer counterweight to the series' darker themes, making him beloved by fans and a welcome addition to the ensemble.