It's because his grandpa had this triangle-shaped protractor he used all the time that he gave to Sumi a while back. It helps him cheer up when he's sad, and I think it makes him feel closer to his grandpa, even now? So he's always happy to see another triangle.
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It's because his grandpa had this triangle-shaped protractor he used all the time that he gave to Sumi a while back. It helps him cheer up when he's sad, and I think it makes him feel closer to his grandpa, even now? So he's always happy to see another triangle.