Phlox
Phlox, a Denobulan, was on Earth as part of the Interspecies Medical Exchange when he was called to serve aboard the Enterprise. As part of the Exchange, he regularly corresponds with Dr. Lucas, his human counterpart on his home planet of Denobula Triaxa.
In accordance with Denobulan custom, Phlox has three wives, each of whom has two other husbands. Only one of his wives, Feezal, was seen on the show. Phlox has five children by his wives: two daughters, both of whom also work in the medical field; and three sons, one of whom is an artist, while the youngest, Metus, is estranged from him (Phlox attempts to reconcile with him at the end of episode 21, season 2).
Phlox is portrayed as having an open mind to other species and cultures—even the Antarans, a race that once warred with the Denobulans. He is extremely frank about romantic and sexual matters, often to other crew members' embarrassment, and sometimes plays the role of matchmaker. He has an interest in natural remedies, and his sickbay contains an interplanetary menagerie, some of which are food for other animals that are sources for medical drugs.
Phlox is curious with a wry sense of humor. He has an affinity for Earth cuisine, particularly Chinese food (especially egg drop soup). He is also interested in religion: He once prayed with a group of monks who visited Enterprise, spent a week with monks at a Tibetan monastery, attended Mass at St. Peter's Basilica in Rome, and observed the Tal-Shanar ritual at the Vulcan compound in Sausalito.
Phlox's physical abilities were revealed gradually during the franchise. He appears to need little sleep, instead embarking on an annual "hibernation" that lasts for six days. He also has great control over his facial muscles, being able to open his mouth wider than humans, as demonstrated by the impossibly large grin he occasionally sports ("Broken Bow", "A Night in Sickbay", "These Are the Voyages..."). When threatened, he has the ability to inflate his head like a blowfish to scare off attackers ("Home").
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