For those born and raised on an island, Ms. Martin-Green has been chewing scenery as one of the regulars aboard AMC's The Walking Dead since 2012. Now (that I've been able to find), there's no "news" relating to what effect this new role might have on her appearances aboard TWD, but as the impending war with Negan will no doubt escalate into a bloody body count once that show returns for the latter half of its season, might viewers be treated to yet another death of a semi-regular? Who knows? I suspect there may be some doom on the horizon for the talented lady.
In any event, kudos to Ms. Martin-Green in joining the Trek family.
As always, thanks for reading ... and live long and prosper!