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yadontnow1 said:
start-0:09 Yuko Matsui (presumed)
0:05-0:13 Chiyuki Tanaka (presumed)
0:14-end Kazunori Ozawa (confirmed)

Ozawa-san said here : https://twitter.com/oza__kazu/status/1606613938749460480?t=odvimB3SLBVqoIPAFry88w&s=19
(characters in Ozawa's part were probably redrawn imo)
New correction : Ozawa-san part was the cloud in the beginning, that I assume before was Imaki-san.
https://twitter.com/oza__kazu/status/1619094571853680641?s=19