Possible Clues:

• Part of GLAAD
• Like Sappho, born in an isle abroad
• Like many characters in "The L Word," aptly
• Part of LGBTQIA+
• Like many characters in Alison Bechdel cartoons
• The 'L' of L.G.B.T.Q
• Like the love story in 2013's 'Blue Is the Warmest Color'
• Man facing endless prejudice when finally revealed as gay
• Either parent in "Heather Has Two Mommies"
• Gay female