Is this other game serious?

So I was looking at recently released mmos on a different site and came across this. This picture is not the nami we know and love. This character is called "tsunami" from a game called magerealm. This character almost looks exactly like nami and even has her name likeness. Ive seen countless games that copy just like this. Is this allowed or can Rito do something? Then we have a "hero" called "green ranger" who, I kid you not, looks exactly like ashe to the T.

Here's a link to their heroes which include vayne, ashe, gragas, nami, ezreal, garen, and volibear. http://mage.gtarcade.com/heroes

I know they cant sue or anything simply because of a likeness, but cmon. some of these look like straight up copies. Im raging hard haha