(A bit of an introduction for a character named Mouse; Bosmer, non-DB, Thieves Guild. How did she come by the Thieves Guild? This is how.)
The first weapon Mouse get in Skyrim is stolen from bandits. It's a bow that's barely holding together and the arrows that came with it don't fly straight.
The realization that she needs new ones come pretty quickly. But that means stealing a new one because she doesn't have materials to make anything and she has no money and even though she is no longer in Valenwood cutting up trees still seems sacrilegious.
Travelers over the tundra were scarce, as were bandits and game. Unless you counted mammoths game, which Mouse did not.
When the little bosmer decided leaving the tundra would be the wisest decision, she happened upon travelers. Two of them, to be exact, with more then enough food. They didn't notice her at first, so she took a handful of the other Bosmer's arrows and another handful of dried meat.
"Brynjolf?"
"Aye lad?"
"Have you seen my arrows? I seem to be missing... most of them actually."
"I would guess," The man took a look over his shoulder, "that our shadow is responsible for our missing things."
"...We're being followed?"
The man just nodded, getting up and running a hand through his rust colored hair. When he started walking Mouse scrambled away from her hiding spot.
She knew what happened to thieves and she didn't want to die, or lose a limb, or...
It didn't take long for the man to catch up. When he did the elf he'd been following had wedged herself under an overhang.
"Now, " He crouched down in front of her, "there's no need to be so frightened. I'm just here to talk." He put out a hand, palm upwards, towards her. For a moment she balked, unsure of his intentions, before handing over the tied bundle of arrows and what was left of the meat she had taken, setting them in his hand and then tried to push herself further into the wall all while praying to Y'ffre that he would just... leave it be.
Instead, he raised his eyebrows in surprise. "That's not what I meant, lass, but you have my thanks." He fondles the tip of one of the arrows, "honestly, I think Niruin deserved it, he needs to pay more attention. You know lass, my organization's always looking for people like you, people who know how to keep out of sight and take things that don't belong to them." He tried to catch her eye but they were firmly glued to the ground.
"Name's Brynjolf, by the way." When he held out his hand again she didn't move. "Wouldn't you rather take a chance in the city then stay out here? Living like an animal." He added in an undertone. Mouse's eyes snapped up to his, still scared. "Ah, I've got you're attention. If you come with us you'll be able to make some coin, maybe get some of your own." Brynjolf lifted up the arrows for a moment. "How does that sound, lass?" he held out his hand again.
After a few moments Mouse took his hand, if not a bit haltingly.