::::I'm not sure what else to state on this matter, George. And as for the same-sex examples, people call Bianca and Lena "Lianca" more than they call them by any other name. "Lianca" short for "Lena and Bianca," not "Bianca and Lena." The same goes for "Rianca" being for "Reese and Bianca," of course, not "Bianca and Reese." That's why those two articles are titled with Bianca's lovers' names coming first. And we certainly weren't going to have the articles titled by the portmanteaux. But, anyway, I don't know what else to tell you regarding my feelings about it not making much sense to have this one fictional couple article's heading structurally deviate from all the other heterosexual fictional couple articles. I'm not about to fight you on this particular instance. I just wanted to comment and move on. And "prominence is key" is also original research. Like you stated, "There are no naming guidelines about fictional characters and couples." Well, except for WP:COMMONAME. You should see is most sources refer to this couple as "Dimitri and Erica" or as "Erica and Dimitri."