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Most likely the work of Kenichi Tsuchiya since he was top KA on the episode and there's not a lot of character acting this expressive in the episode with the majority of the runtime being stills.
SakugaDaichi said:
Most likely the work of Kenichi Tsuchiya since he was top KA on the episode and there's not a lot of character acting this expressive in the episode with the majority of the runtime being stills.
I agree. Kenichi Tsuchiya is very likely the animator in this.