Princesses with red hair are rare in Manga, or in general. I wanted to read something similar to these three with red-haired princesses but couldn't find any. So if you know about one please let me know in the comments sections. Anyways other that the fact that they have read hair princesses, these mangas has lots of similarities. Which I'll e talking about later. Before that, let me introduce them a bit.

Akatsuki no Yona


The main Character is a princess called Yona. She is a pampered princess who is no idea about the outside world. She has a crush on her older cousin Soo Won and has General Hak for a best friend. Three are childhood best friends and on best of terms. However, Everything comes crashing down when Soo Won decides to kill his uncle the king and Yona with him. Hak somehow manages to save the princess and flee from the castle. Soo Won after betraying his best friend and cousin takes the throne and label Hak and the Princess as fugitives.Although Hear broken and helpless, Princess takes to her harsh new life as a fugitive without a complaint. On her travels, through the country, she realizes that her county isn't the prospers and safe haven as she thought it was. SO she has a lot to think about before confronting her farther's murderer.
 

Akagami no Shirayukihime


Shirayuki is a Cheerful and kind hearted girl who works as an apothecary in her herbal shop in town. Prince of her country hears of her apple red hair and decides to take her as a concubine. Shirayuki of course, doesn't want to be a concubine to the stupid prince because of her red hair. So she flees the country. However, The evil prince doesn't seem to be satisfied with that. So he finds her and sends her poisoned apples. Yes, very snow white like. But Shirayuki is not the one who eats the Apple. Shirayuki isn't a princess but she'll most likely end up being one, so I added this to the list.    
 

Reimei no Arcana


Senan and Belquat are two neighboring countries on an Island. They have been in constant war for 200 years. So to bring peace to the both countries The royal families has arranged a marriage between Nakaba, a princess from Senan, and the second prince of Belquat Caesar. Even though the marriage became a peace treaty, It's fragile at best. And something were to go wrong, Nakaba's head would be delivered to her home country. And it doesn't help that her husband and everyone treats her like a dog. They even go as far so to casually joke about her death. This not simply because she's from the enemy country. Royal families of both countries has black hair and only ones with colored hair are the commoners. So it's natural that her red hair frowned upon. On top of that, the princess has an ability that will guarantee her death if found out. And when she's given a choice between saving her husband and returning to her country, what will she do?  
Okay, This sounds very clichè and doesn't seem to have the most original of plots. But this is one of those mangas that will excels even with all that. It has a deep story and good character development.
 
 

Similarities

Other than they are all set in a historical fantasy world and having red haired princesses, they have lots of similarities.

Forced to leave their homes

All three of them are forced to leave their homes. one because her cousin wants to kill her, one because the prince of her country wants her to be his concubine and the other because she's married off to the enemy.

Self-inflicted premature hair cut

All the characters are pretty much forced to cut their hair. It's not that they are ashamed of their beautiful red hair. It's more like circumstances forces them to cut it. Mostly to protect them self or someone else. However, in the end, they end up having short hair and doesn't seem to be much bothered by it either. And they tend to hide their hair in public because it draws too much attention.

Powerful in their own right

Yona is the reincarnation of the Red Dragon King Hiryuu(a powerful king) and has the power to command the four dragon warriors. She's also good with the bow and quite resourceful. Shirayuki has her hard working brain and she's also somewhat fearless and determined to succeed. Nakaba has her Arcana (a power to see the future). So you see, They are powerful on their own even without their friends.

Reverse Harem

Since all three of them are beautiful and remarkable women they have more suitors. Most of them are good people too. But this doesn't necessarily cause love triangles. So don't expect such drama from these mangas.

Best friend that has feelings for them

Each of them has male best friends or something similar to that And it's natural that they develop feelings for the princesses. But the princesses are pretty much blind to this development. It's not that they are friend-zoned, so there's hope for them yet LOL :D. (some fans like me are hoping for more development on that front. Especially Hak fans).

Enemy turned friend

The enemy is a strong word for them but they clearly weren't friends, but after they are sort of defeated they eventually they became good friends. Naming them would probably spoil the stories so I won't do that. But there's one in Reimei no Arcana too.

Personal body male guards that also acts as their friends

This might be obvious because they are all princesses. But these protectors also acts their best friends. Like Hak who is Yonas childhood friend and Obi who looks after Shirayuki but clearly a BFF. 

 

Akatsuki no Yona and Akagami no Shirayukihime both has good Anime adaptations but the both of them are still ongoing while Reimei no Arcana doesn't have a anime adaptation but the manga is completed. I highly recommend the three of them to anyone who likes historical romance and political stuff.