Obi-Wan Kenobi was a Jedi Master for the Old Republic. He was the uncle of Nathaniel Kenobi.
When Abigaile Jade came to Tatooine to help him protect the young Luke Skywalker and to escape her arrogant husband. He found out that she had been captured and received her personal droid Kex. Kex gave him information about what had happened to her and his nephew.
When Nathan came to look for his wife, Obi-Wan helped drive back some Tusken Raiders that had attacked the remorseful Nathan, with a krayt dragon mating call. He gave Kex's information to Nathan and gave him his blessing.