Which 5 star should i choose

People recommend Veronica because she's important for Free to Play guides as thats who they are using

Veronica is one of the best F2P units in the game and is used in almost all F2P guides which is why people recommend her, Celica does have her perks aka being able to Quad with any sword but she needs some kind of healing in order to constantly Quad

'Remove Ike'?

One little tip to help out, never get rid of a unit that's only 5 star unless you REALLY don't like the unit. And even when you got more than one, make sure that you understand the skill system before doing anything big.

You can check the heroes tab here and use the '5* only, 4* base and 3* base' tabs to check what rarety a hero can be' It's also shown on their hero page here.

The thing with Celica is that she's in a class that's very common. Infantry sword units are not hard to get.

But Veronica is a unit that has many ways to stand out and is easy to use.

As for Ike (Is it the axe version?) vs Dorcas, Ike will do better against melee units and heal himself with ease, while Dorcan can counter attack agaist ranged units.

You can use Dorcas alongside a mage with high res, so that mage can take on other mages, while Dorcas takes on archers and dagger users.

Brave Ike can work well to bait in units using lances and axes, and even some slower swords. He'll often live through one fight with a ranged enemy thanks to the effect his axe has, but he can't fight back until the turn after.

Hopefully this isn't too much info at once.

Veronica brings so much utility and even some good damage to the table so it's hard not to recommend her. Celica is really good but you're better off starting with Veronica. Not to worry about Celica, there'll be more chances to get her down the road.

Since Veronica is actually going to show up very soon on a different banner (in about 6 hours from the time of this post), I suggest that you hold off until that Legendary banner passes--especially if you plan to summon on the Colorless stones there. I'm fairly certain that the Choose Your Legend banner will never expire, so there is no rush to pick right away.

Now, if you don't care for summoning Colorless on the Legendary banner, then plenty of people have given their reasons as to why Veronica is the superior choice in terms of clearing in-game content. In my opinion, there is no other Brave unit that brings the same amount of utility and power that Veronica does. However, if you like Celica more than Veronica despite Veronica's utility, then go ahead and pick Celica instead. (In the end, you decide how you want to enjoy this game.)

I would actually be the oddball and recommend the use of heroic grails and that free summon to make an armor team. With the Black Knight, Valentines Eliwood, and Brave Ephraim, you would have the start of something great.

For the CYL2 free pick, you can't go wrong with any of them. But Veronica is used in a lot of F2P guides if you follow those because she offers the best utility out of the four thanks to her unique staff, Wrathful Staff and Windfire Balm. She's who I would recommend, but you don't necessarily have to take my advice. I only picked her as my free pick because I already got the other three just by summoning.