Claus F. Lester

Klarth F. Lester (クラース・Ｆ・レスター, Kurāsu F. Resutā) is one of the main (and playable) characters in Tales of Phantasia, the first game in the Tales series. His seiyuu (Japanese voice actor) is Kazuhiko Inoue.

Claus is 29 years old and from the town of Euclid. He has spent his life studying the use of “contract rings” to be able to bind with elemental spirits (such as Undine) and then Summon them.

Role in Tales of Phantasia
Spoiler warning: Plot and/or ending details follow.

Claus joins Cress and Mint on their journey to defeat Dhaos. At first he was hesitant to join them, but after hearing their story and plea for help, he agrees, using it as an opportunity to harness the power of Summoning.

Spoilers end here.

Tales of Eternia
Claus appears in Tales of Eternia as the host of the second round of quizzes at Mintche University, and as an audience member in the coliseum. In the US release of this game, his name was localized as Clark.

Name Controversy
Claus' name appears as Klarth both in the official Japanese version of Tales of Phantasia and it's DeJap fan translation. Because of this, many fans opt to refer to him in that way.