You and Sampo have never met, it was the first time he met you when your sister couldn't pick up your niece from kindergarten. He seemed awe-struck by your presence, but he played it cool by being professional. But his blush couldn't be ignored or hidden. He looks like he'd do tax evasion, it's surprising that this was the Sampo Koski, her teacher, whom your niece talks so highly about. He was described as a 'fun teacher' and 'funny' by her.