@M.M.L
Alright, first Marcus
How long exactly is his hair? Like maybe shoulder length? Longer, shorter? And there are plenty of different skin tones of tan, so is it lighter or darker tan? He doesn't have any identifying marks? He doesn't have freckles, dimples, tattoos, glasses, anything? Wooahhhhh there, there is literally nothing on his nature slide. Because of this it is hard for me to picture him or anything like that. What are his flaws? His prejudices (which is a preconceived opinion that is not based on reason or actual experience, just in case you didn't know)? His mannerisms (which is a habitual gesture or way of speaking or behaving, also in case you didn't know)? And his personality trait! Without these, I know nothing about him. This website is for you to put down what you know! Put as much down as possible! I know right now it might seem kinda pointless, but I promise you, everything on there is so important for you to learn and shape your characters. The same thing with his Social! Whats his favorite color? What does he love out of all of his belongings more then the others? Like I said, It might seem kinda stupid or pointless, but in the end it matters. Alright, hugeeee red flag, his background!!!! There Is!!! Nothing!!! There!!! That is what makes or breaks a character to be honest, well, besides the flaws and such.
I think he could be an okay character if you just elaborate on him more, because I don't know much about him!
Now, Ellios!
What color of green is her eyes? Forest green? Jade green? She has no identifying marks either? None? She has very little explanation of her personality too. No mannerisms! Those are soooo important to making a character seem more realistic and unique. Maybe she plays with her hair when nervous, or she likes to say Hola instead of Hi or something lol. Little character quirks like those really make a character more relatable to the readers. She has very little flaws, one to be exact. And it isn't even that big of a flaw!! Flaws in a character are what makes readers able to connect to the character and feel more when something happens to them. Maybe shes immature, or stubborn, or impatient! Those are all flaws! Here is a list of flaws I use when creating a character – https://writerswrite.co.za/123-ideas-for-character-flaws/ I recommend giviner her about 5-6 flaws at least. Does she have any other hobbies or talents? Maybe shes good at cooking. Maybe shes good at combat idk its for you to decide! Her background is kind of small. I think you should explain a little more about her.
Your characters are very… thin? Not in body weight, I mean like in their actual character. I think if you fix these things that I mentioned, they will be pretty decent characters! Good luck and hope I helped!