(Is Van Vleuten in the picture with Lloyd and Bäckstedt-Calvert?)
Is it Dani New Year's Eve? No...

Annemiek van Vleuten? No (she's still active, and not much Christmassy or New Year's Every - whatever that means - about her name, also pretty sure she has been team leder in a GT-ish race)
Is it possible to spot her on the photos below? I think so (not super good at recognising faces...)
Does she work with someone named Danielle, who also used to be a pro cyclist? Yes and no. Maybe... (nice conclusive answer there)
Does she work with someone named Daniel, who also used to be a pro cyclist? No. Or maybe yes.
Native English speaker? Yes
Retired after 1/1 2019? Yes
Active? No
European? Yes
Male? No
Is it possible to find a picture of this person standing next to someone named Danielle? No
Christmassy or New Year's Every name? Yes
Ever been a team leader in a GT/GT-ish race? Don't think so