Terra is one of the main protagonists of Kingdom Hearts Birth By Sleep.He is one of the three apprentices of Master Eraqus.Heis known for his strength.He wants to becom a master of keyblade.His name in Latin means "Earth" while Riku name means in Japanese "Land".They are connected because Terra choose Riku as his successor,Riku destined to wield the Keyblade in the future after meeting Terra when he travels to the Destiny Islands.His key phrase is"You have to be strong. Strength of heart will carry you through the hardest of trials."
—Terra to Cinderella upon their first meeting