A Geass is set as a contract between an immortal and a human who receives a unique power.It manifests in one eye,and with continued use increases in power,eventually becoming uncontrollable and spreading to both eyes.When a Geass is at full power,a person can then become a recipient of the immortal's "Code",that which grants them their power.This new immortal receives the Geass mark somewhere on their body,immunity to Geass,and the ability to make their own contracts with others,while the giver is allowed to die (perpetuating an endless cycle).This process is not necessarily consensual,as C.C.received her Code and V.V.had his taken away against their wills.
GEASS是永生者与拥有特殊力量的人类之间的一种契约.它显明于二目之一,随着使用的进程而愈发强大,最终失控而占据双眼.当此力量满盈之时,持有者成为契约者的“CODE”,并被赋予力量.这位新生的永生者在实体上获取GEASS标记,并产生免疫,同时获得转授契约的权利,并被允许死亡（依此无限循环）.这一进程不要求双方同意,例如C.C将CODE收纳的同时,V.V在违背对方意愿的情况下将其去除.
Every Geass power has its own unique set of both abilities and limitations (for example,Lelouch's power can only be used once on a given person),allowing for their defeat or victory by someone who is aware of its characteristics.Further understanding of the power of Geass even leads to the development of a device that can undo its effects.All Geass abilities that have thus far appeared within canon of the television series have been related to the mind,influencing things such as emotion,perception,and memory.
