Here's a bit of lore from The Worlds of Netrunner, page 73, "There were two Nisei clones before her, and what became of them is uncertain. As you might already know, Jinteki often names its prototype clones alphabetically, so Caprice must be the third of her line.

Think we've just met the AWOL first...

21

But who is then clone B if not Letheia?