I know it was not the writers' intention to have Lucy be the same Lucy from Little Lamplight, but the story feels more complete and believable that way to me :) Those two got along like two peas in a pod. They were definitely sittin' inna tree.

I based her appearance off both Lamplight Lucy and the generic "basic hero" sprite that was used to represent her in the Fallout Shelter Online mobile game.

I like to think she generally matched his energy, only she was a little more emotionally mature than him. I think she also would have been more no-nonsense than he was, and not very interested in sci-fi stuff or comics. But, she would've been quite bookish, and knowledgeable in all sorts of things she could source from prewar media. I think she would've had a particularly sharp memory, and pick things up quickly--thus how she managed to become the resident medic so early on. Maybe she's a STEM buff, and more of a "hammer and nails" kind of person than MacCready.

To give context to the little quip she was making above, I have a running theory that Lucy actually lied about making MacCready the "wooden" toy soldier (or "solider" as it's spelt). My main idea of what actually happened is that she found out that MacCready was a mercenary one way or another, but didn't tell him she knew, because she either:

1.) felt that she should let him come to her with the truth on his own terms

2.) thought it was a perfect opportunity to lie back

3.) or maybe was planning to, but y'know... she died before she could get a word in.

The reason why I think Lucy hadn't made the toy soldier, is because of this specific terminal entry that can be found in Fallout 4, at the Coast Guard pier.

This had triggered my suspicion, because it confirms that the fact that the "wooden" toy soldier is able to be scrapped for ceramic isn't an error. Isn't it odd that this toy soldier was supposedly hand-carved out of wood, but is made of ceramic? Isn't it odd, that there is proof that before the war, other non-wood toy soldiers existed, and that there were more than one?

Upon further inspection, I did find it strange how smooth and radially the toy soldier had been carved. It appears to have been turned, rather than whittled. It would be deeply unusual for Lucy to have to have access to a wood-turning workshop of pre-war, industrial caliber in the wasteland. And, it would have been very difficult for Lucy to have been able to produce something so exact and symmetrical without the proper equipment and extreme time/dedication to do so.

Furthermore, if you observe the paint job, it almost appears stenciled on, or perhaps painted with a very fine brush. Mind you, this is a small figurine. It also uses various colors (or stains?), and shows an apocalyptic amount of weathering and fading on its body. It's hard to believe that this is new painting, done in the wasteland. It must be pre-war work.

I also think Lucy didn't have to be in on some silly snarky 'revenge' thing, passing this pre-war thing as her own work, although that's my main interpretation. She could've also been completely clueless about MacCready lying to her. That, however, implies she was trying to impress him. I think this interpretation's equally cute though, because it means they liked each other so much, they both felt the need to try and look good in front of each other...