Rin Tsubokura

is a Shinigami and a researcher of the Shinigami Research and Development Institute.

Appearance
Rin has a small pigtail in the front side of his hair which is secured by a red tie. He wears that standard Shinigami uniform underneath his lab coat. Rin is almost always showing a face of distress or preoccupation.

Personality
He has a fondness for candy and sweets. He is a bit clumsy.

Arrancar arc
He is mostly sent to easy missions, just like when he was sent to give Ikkaku his molars. Though he stepped on them, he put on a note saying, "These molars are invisible for idiots".

When he has to help an earth-bound soul to make a cake for his mother, he immediately offered his help apart from protests from Yumichika Ayasegawa.

The Thousand-Year Blood War arc
When Akon is arguing with Kisuke Urahara as he tries to contact Ichigo Kurosaki, Rin notes that Akon is losing his composure.