Well it been four years since Fire Emblem Heroes came out and during those four years we got many units but mostly the Choice Your Legend round 4 is coming soon and during those times people can vote on who get a new look or enter the game as a free unit for the free summon there four winner's two males and two females.
From the women division 2nd place is Lysithea

From the men's division 2nd place is Claude and no he doesn't have his relic weapon sadly

Now for 1st place in the women's division Edelgard tho is kinda good that we now have four versions of her. Pre time skip, Flame Emperor, Adrestin Emperor and CYL Edelgard but I kinda wanted enlightenment Byleth but still good

Now for 1st place in the men's division is the leader of the blue lion and king of Faerghus is Dimitri

These four heroes will be free one summon only later in August and later there will be a video showing their skills.
Now these heroes will be free to your choice of summon but remember only one summon after you choose your hero the only way to get more is through summoning more. I wish you luck and four years of Feh is near us!