Question why everyone pictures Barghest that tall? She is 190cm, 6,2336 feet says Google (idk if with the heels, given that in many cases they also count the heals) I literally reach her nose at least

Mini Update since after I posted someone else also voted something else

So let's see the options so far:

·Someone said maybe doing a supporting mage in a way, not a master, but someone that while doesn't has a servant they have the power to hold their own and isn't exactly human per say. Basically, a Mage that is really strong on their own. (I'll explain more about the not human part in the background's part)

·So far for classes we had A pretender and A beast, I'm not forgetting you KalaNora I'll talk about it later. (update also a saber)

-So let's see Pretenders are a weird bunch since none are exact to the other in abilities nor with similar backgrounds. Let me explain.

Hephaestion is claiming to be someone who she isn't, she literally is the shadow of Iskandar created by magic as stated in her description.
Oberon isn't the real Oberon but the depiction of a comedy created by Shakespeare, that is why he has that personality of a free spirit and then someone that doesn't care what will think even if they hate how he speaks.
Lady Avalon... is just weird as the description says you didn't summon her she just came out of nowhere and she is Proto-Merlin but it seems they don't treat her as a merlin in descriptions.
Tenochtitlan is the spirit of a city, that's the best way I can explain it.
Nine-Tattoo Dragon Eliza  as of right now doesn't have a translated Wiki description so I cannot talk about her

So yeah pretenders are weird and I'm still trying to figure out how they work in case that's the winning option

-The other option that someone said was Beast, so far from what I understood from the Beast descriptions

It says they represent the evil of Humans, that is the reason Sodom Beast is a Beast it's because it's the monster that represents the monster that destroys Babylon in the New Testament

So from what I understood that they must represent one bad aspect of the Humans either their bloodlust, rage, lust(Sesshōin Kiara), or whatever bad aspect of the humans they represent. The personality isn't that important as stated in the description of Sodom Beast the body affected her personality in the end after passing time with the Master of Chaldea.

Nero's Personality repressed and changed the beast's personality affecting it.
"Arrogant, yet selfless.
Cruel, yet loving.
Sensitive, yet prone to loneliness."
So depending on the origin of the body the personality may affect it in the end.
Take it in mind.

-Saber: Do I need to explain it? A hero that has a sword like king arthur or any knight, in one of the novels, appears one saber that I love called El Cid a Spanish knight that I love a lot but in the novel, he is killed without being able to show a lot.

·So that's the classes so far, so backgrounds

Now onto the background that is what KalaNora talked about in their comment, as a class may be anything for what you mentioned.

-A knight of the round table that aided Mordred in the rebellion against King Arthur and died in battle in the Battle of Camlann.-

I will need to expand into it but it would be interesting as you say for the time you meet Knights of the Round Table.

-In the case of the master option winning, I think I have something prepared that would make sense given that exorcist families' traditions vary, that's part of why Asagami Fujino lost her sense of pain just to adapt to the dormant power of her eyes.-

So yep, that's it for now I'm still exploring possibilities for the options specially the background. So if you still want to lay down ideas let me know.