Lanara Diol was a female Federation ambassador in the 24th century.

In 2368, she was dispatched to planet Drema IV to initiate formal first contact with the Dreman people. Following months of negotiation with planetary leaders, Diol recommended to the Federation Council that Drema IV be made a Federation protectorate. At the same time, she cautioned the Council that, although the Dremans had offered their planet's rich dilithium resources as a part of their treaty, the Federation could not allow this wealth to overshadow Drema IV's other needs and considerations. Diol's arguments were persuasive, and Drema IV was granted protectorate status. (SCE - What's Past eBook: Progress)