KRU, FOST (FO stormtrooper), FOX (FO executioner) & FOO (FO officer) are all toons that can be used from mid-gear levels to relics.
FOST is on a cheap Light Side node and is a great toon.
FOX is on a cheap Cantina Battles node, and FOO can be purchased with the currency you gain by farming FOX, the Cantina Battles Store tokens.
So that's 3 characters that are available immediately and easily that you will never regret gearing up.
Phasma is available incredibly cheap and fast through the Galactic War store. Even if you don't have access to that store just yet, it's coming very, very soon and it doesn't take long at all to get Phasma all the way to 7 stars.
Phasma isn't a great character, but is a very good starter character and fits with your FO needs.
Those 4 toons should make it easy to field a full squad under your KRU lead, but be careful not to put too much gear on Phasma right away. Much, much later you might decide to farm the requirements for Galactic Legend Supreme Leader Kylo Ren, and they you'll need tons of gear on Phasma, but just to get you started in the game, you shouldn't give her too much gear. G8 or g9 is fine. By g10 you'll definitely want to stop and prioritize something else. G11 is too much.
