The term 'Nirvana Obtainer' is a Buddhist term for an Arhat, which is a person who has achieved enlightenment and is free from suffering. An Arhat is someone who has attained the highest level of spiritual development and is considered to be a model of perfect virtue and wisdom. The term 'Nirvana Obtainer' is often used to refer to a person who has achieved the ultimate goal of Buddhism, which is to reach a state of perfect peace and freedom from suffering.