You know how new parents only call people what they want the baby to call them? Like they’ll refer to their partner as “dad” “mum” etc. when the kid is around, or their siblings as “uncle/aunt”, like to train the baby? Lily and James did this religiously.
Well Lily, James, Remus, Sirius, Peter, Mary, and Marlene often go out for dinner (or some combination of people from that group) when a babysitter is available for Harry. Not even two minutes after the food arrives, Lily goes, “Dad, Uncle Moony, will one of you pass the butter?” and they all laugh, because it’s like Harry’s there when he isn’t. They laugh about the indelible impact Harry’s had on their life.
He’s there in Lily’s fond words, the yellowish baby formula stain on Marlene’s white shirt, in the bags under James’s eyes, in the drawing of a dark-haired stick figure and a heart that Sirius keeps in his pocket, he’s at the table in every seat.
They clink champagne glasses, “to Harry!”
The clink of James’s glasses as they fall to the floor, a mouth opening in a silent, trapped, eternal scream, and Lily’s guttural yell of “Dad!” She never gets to hear the baby in her arms say Mum, all the training unnecessary.
Training unnecessary, because there would be no “Aunt” for Marlene, killed off quick, Harry would never know she was even a friend. No “Aunt” for Mary, out of the picture one way or another.
The training unnecessary, as Harry meets his uncle for the not-first first time, calls him “Professor”. Remus never thought about the coldness, the distance of the word, and once his first class is over, he sinks into his seat, tears threatening to spill over.
The raw fear in Harry’s eyes, when he meets his other uncle, splits Sirius’s heart in two. They took Harry’s drawing from him, when they locked him up, and they just about took everything else too. He remembers a baby’s tiny laugh, not this terror-stricken, haunted kid that he’d been unable to protect.
Certainly no “Uncle” for Peter, gone almost as quickly as he came back.
When Harry finally knows Remus and Sirius as anything other than a professor and a criminal, there’s no happy laugh, no “Uncle”, just suddenly one grieving man and one grieving boy, one mourning a lost love, both mourning a man who Harry never really got to know. It doesn’t bring Remus and Harry closer together, both too shattered, no room for “Uncle”, only room for war, arguments and deserting and covert operations.
Remus is dead before the ever really make up from their arguments, training gone unused again. Harry whispers “Professor…” at the grave.
Only Lily and James are honored in the end, the others all just war casualties or betrayers, Harry’s biggest father figures gone unrecognized. Harry was indelible in their lives, but they were barely there in his.