Why?
Because Rasa had made a deal with Chiyo.
As long as he ignored Sasori killing the Third Kazekage, Chiyo would take Kankuro on as her student and teach him the Puppet Technique.
Chiyo's Puppet Technique might not be the strongest, but she was the best at teaching it.
She had taught Sasori the Puppet Technique.
Rasa had Yashamaru bring some fish, then took Kankuro and Temari to visit Chiyo.
Sasori was dangerous.
Rasa knew he was dangerous, too, but with Anbu around and Chiyo there, surely Sasori wouldn't eat Temari and Kankuro, would he?
Rasa also wanted to improve his relationship with Sasori.
After all, war was coming. They would have to trust one another with their backs, so he couldn't keep treating Sasori with suspicion.
When Kankuro heard he could meet Sasori, he was thrilled. His bottom didn't even hurt anymore. He got up, took Yashamaru by the hand, and tried to hurry to Chiyo's house.
"Kankuro, slow down. Don't fall."
Kankuro, Temari, and Yashamaru walked along the road to Chiyo's house.
Yashamaru carried two monkfish tied together with a cord.
Kankuro was beaming. "I'm finally going to meet Lord Sasori! This'll be the first time I've ever met him."
Sasori had defected three years earlier. Kankuro hadn't even been born then, so he'd heard all about Sasori from other people.
Sand Village's renowned Genius Puppet Stylist, the most gifted Puppet Master in Sand Village's history, the god who ruled over puppets in the ancient Land of Wind...
That string of flashy titles only made Kankuro admire Sasori even more. He was already fascinated by puppets.
He had to hurry to Chiyo's house, stand at attention for Sasori, and try to become one of his men.
Temari lectured Kankuro like a little adult. "Kankuro, don't make a fuss