Biwwy

Biwwy is a child found in Little Lamplight, who resides in the Great Chamber of the settlement. Biwwy has a speech impediment where he pronounces all of his L's and R's as W's, and if asked why he is named what he is, will respond with "Nickname? What nickname?". He is also unaware of his speech impediment; when you tell him to stop talking like that, he says "Stop tawking wike what? Wou're weiwd."

Biwwy lives in the Great Chamber. Find the blue tarpaulin on the walkway, he lives in an alcove near it.

Unmarked quest: Biwwy's Wazer Wifle
Biwwy also has a special Laser Rifle, called the Wazer Wifle, that is a bit more powerful than a standard Rifle, and holds a larger magazine. It can be purchased for 500 caps, or for "fwee" with the Child at Heart perk. You can also haggle him down to 250 caps if your Barter skill is high enough.

Also may be obtained by reverse pickpocketing if he has it equipped.

Bugs
There is a glitch in which Biwwy is found in the nearby pool of water, unable to be engaged in conversation, making Wazer Wifle unattainable.

''Open up the console (~), click the character in question (ensuring you are on land and away from the water's edge) then type "moveto player" (no quotes). The character should be teleported out of the water onto dry land right next to you, and the Wazer Wifle can then be obtained.''