- Jiro’s birthday is August 1st, she is 154cm tall, her blood type is A, and she was born in the Shizuoka Prefecture.
- Jiro’s favourite thing is rock and her hairstreaks are drawn similarly to the waves of an EKG (which is considered to be a possible reference to how she uses her earphone jacks to amplify her heartbeat)
- Jiro’s preliminary design didn’t undergo much change. The most noticeable difference is that she lacked her hair streaks in her preliminary design.
- Jiro and Denki share the same costume designer.
- Jiro’s surname contains the kanji for ‘ear’ (耳 ji) and ‘son, male’ (郎 ro). Her first name contains the kanji for ‘sound, reverberation’ (響 kyo) and ‘incense’ (香 ka).
Jior’s first name also contains syllables coming from both of her parents’ names. ‘Kyo’ comes from her father called Kyotoku, and ‘ka’ comes from her mother called Mika. Jiro’s surname is also from her mum’s side of the family!