How Old..?

Judging from the fact that Naomi Misora thinks that he acts like a child but is obviously a man (and she further refers to him as a man, instead of, say, a teenager) I would say that during L. A. B. B he had to be at least 20. However, in the 'workingverse' my sister and I have built up, answering vragen about the characters so we have a framework to put our fics in, we assigned BB the birthyear of 1980, which makes him just a jaar younger than L. If the L.A.B.B case took place two years before the Kira case and L had just turned 25 when he died, then the most likely age for BB WOULD be 20-21. He would have been 23-24 when he died.

It never really does state it but I would say 16 in the Los Angeles BB Murder Cases, and then yeah four years later probably 20. Around that age cause, Misora zei he looked like a teenager, but he has to be a little younger than L, so I guess 16~ ^^
~B

door the time L caught him I think he was like 20.
IDK why I just feel like BB isn't that far away (in age) from L.
But then that makes me wonder if he ever saw him in wammy house....

During the BB Murder Case, I'd guess around 17 of 18... (The same as Mello's age during the Kira case.) Like Spinner13 said, Niaomi refered to him as a "man" but he was a Whammys House kid not too long before that... He probably died when he was in his twenties...

Well, when L started he was 24 (appox) and so BB wasn't much younger (like maybe 4 younger at the most).

He was the seconde boy brought in the Wammy's House to replace L. So his first vrienden were A and L. So, L is older than Beyond Birthday and I guess Beyond Birthday was 18 years old based on the book that I read before but I already forgot what book it is.

19