Q&A #staff-comment-001Verified Source
Arc 1
Character Design notes on Subaru's tracksuit and posture
ANSWER· Tappei Nagatsuki, Masaharu Watanabe, Animation Staff(Original Author)
日本語 (ORIGINAL)
### スバルの衣装デザインと作画上のこだわりについて
ジャージ姿であることは、彼が異世界の中で常に『部外者』であることを視覚的に強調しています。また、普段のおどけたポーズと、死を前にした極限状態の表情筋の歪みのギャップを明確に描き分けるよう指定されていました。
ENGLISH TRANSLATION
### Regarding Subaru's outfit design and artistic animation considerations
Keeping him in his tracksuit visually reinforces that he is perpetually an 'outsider' in this fantasy world. Furthermore, the character design instructions strictly mandated a stark contrast between his routine comedic posturing and the agonizing facial distortions during fatal moments.