Sano is one of the teachers in the space school. Sano attempts to sabotage Asumi because he falsely believes her father was partially responsible for the Shishgou disaster. He gets in trouble for this and resigns. He resurfaces in the manga with insights on the Shishigou incident and, once again, gets in trouble for it. However, he eventually becomes reconciled with Asumi's father. (Source: Wikipedia)
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