Does Bitcoin have a legal expert/team that does their work? Does Bitcoin have a legal expert/team that does their work? (yes, they - a group of interested individuals (the Bitcoin team) even though they have no formal association - are a decentralized network but some of those decentralized networks do have offices, etc., and may have a legal team.)

Are there any private individuals who have (ever) started an action on behalf of Bitcoin?
BITCOIN is a software ecosystem, and not owned by "someone". Similiarily you could put some code [echo "hello world"] on github, and it would be publicly available. Then there is also no "they", or an association managing the code. The bitcoin developpers are a group of loosely coupled "geeks/freaks", and anyone with a good skill set could belong to this group, by participating in coding/translating websides/correcting wording ... For sure you know that. So as this developer team provides (a highly sophisticated) software, they are not dealing with regulations from each country, in which the software could be used. But I think your point goes into this direction:

There are companies using this public domain ecosystem (kraken, bitfinex, hitbtc, bitcoin.de, blockchain.info). These companies (and some miners) provide ramp-ups and -downs, to make it easy for you and me to use the bitcoin eco-system. They are for sure under a jurisdiction, within their appropriate countries. And for sure "they" have legal/compliance teams, that deal with country specific regulations (aka "KYC/KYI/..."). 

Still I am not clear on what you suppose by "their work". I think it would be fair to say, Bitcoin doesn't need any work at the legal level. Countries and governments (or other power structures over individuals) need such things, so it is up to "them" (these power structures), to make sure, bitcoin is used in a way, that it complies with their rules of keeping tidal waves of change away from their protected environment :-)