Robert Doi

 was and old friend of Yutaka Kanzaki.

Appearance
Robert is an elderly man with messy gray hair and mustache.

Plot
Shizuku Kanzaki and Miyabi Shinohara went looking for Robert, as Shiro Fujieta told them he was their last hope trying to find a replacement wine for '99 Henri Jayer. They found him homeless living in a selfmade cardboard house, but he refused to come out until he heard for what they were looking him for. When he heard Shizuku was drinking wine only since yesterday, he decided to test them and dig out couple of wine bottles he had hid himself. He then gave Shizuku two glasses saying he must find the secret between them. After tasting them and thinking, Shizuku told Robert the wines were the same and were made from same vineyard. Robert then started laughing and explained he was correct. He then pulled another bottle from his stash and gave it to Shizuku. As they left, Robert commented that Yutaka's son had ripened.

Couple of days later, when Shizuku decided to drink the wine his father had left, Robert was called as a judge. Issei and Shizuku tasted the wine and gave their answers. Robert announced Issei as winner, but as all left, he told Issei that, while he described the "present" of the wine, Shizuku described the "parting wine" his father felt, and that Shizuku managed to guess the year of the wine, because he had tasted the grapes from that year and remembered their taste.