Alexander Gideon Lightwood know as Alec, is a fictional character from the young-adult fantasy franchise Shadowhunters. The character is potrayed by Kevin Zegers on the movie Shadowhunters-City of bones and by Matthew Daddario on the tv series Shadowhunters. Alec was created by the writer Cassandra Clare. In Shadowhunters, Alec is a Shadowhunter, also known as Nephilim, a secretive race of beings who are humans born with angel blood. They have fought demons and lived alongside Downworlders in the Shadow World for well over a thousand years, creating their own culture and civilization within human society. Their mandate is to keep the peace in the Shadow World and keep it hidden from the mundane world while protecting the inhabitants of both worlds. Despite their ancestry, Shadowhunters are mortal and therefore vulnerable to old age and death; however, their angelic blood endows them with special abilities that allow them to achieve feats beyond what's humanly possible through the application of angelic runes.
In the books, and in the tv show, Alec was the first openly gay shadowhunter, and his courage to live openly his sexuality, gave courage to other shadowhunters to come out, living openly their love.
Also, enventually Alec and his partner Magnus Bane, will also become dads.