Kamen Rider Zero-One 35.5

Episode 35.5; What Created MetsubouJinrai?; ナニが滅亡迅雷を創ったのか？
	Kamen Rider Zero-One episode
Writer	Takahashi Yuya
Director	Kakehi Masaya
Action Director	Watanabe Jun
Original air date	June 21, 2020
Viewership	N/A
Forum Thread	Thread
Episode chronology
← Previous; Super Occupation Taisen 2	Next →; Episode 36; I'm the Ark Kamen Rider
	Episode List

Kamen Rider Zero-One
< Super Occupation Taisen 2	What Created MetsubouJinrai? ナニが滅亡迅雷を創ったのか？	Ep 36 >
Aired with Mashin Sentai Kiramager Episode 11

Important things that happened

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Ark - Hayami Show → アーク - 速水奨
Naki - Nakayama Satsuki → 亡 - 中山咲月
Uchuyaro Raiden / Kamen Rider Ikazuchi - Yamaguchi Daichi → 宇宙野郎雷電 / 仮面ライダー雷 - 山口大地

As continues to naming scheme of Is and Was with using English names for Humagears. Although since this is an evil Is, perhaps it's a combination of Ark+Is or Aku(evil)+Is?
When As replies to Jin with "The Secret As-chan", it's a reference to "The Secret Akko-chan" (Himitsu no Akko-chan), an anime and manga popular in the 60s.
kanacaeilius noticed that the numbers for each of the MetsubouJinrai members correspond to a Japanese word:
- Horobi - 0103 - o-tou-san --> otousan (father)
- Ikazuchi - 0223 - o-ni-ni-san --> oniisan (older brother)
- Naki - 0188 - o-i-ha-ha --> (cannot exactly figure out the pun but from what I can tell, it might be “haha = mother”). This might be a kanji pronunciation for roubo 老母 which means "elderly mother".