So I can only level 1 of them. Which one should I level up?
I have a lot of other red heroes but not gonna start of them yet. Also I dont have a 5* red healer and cleric emblems goes to Ariel, so Grazul would probably not be emblemed.
Also i dont have a good 5* rogue, so this is forcing me to choose Marjana.
So, should i level Grazul or Marjana? If Grazul then should i put emblems on her over Ariel?
Depends on your other red heroes imo.
I would choose Grazul if it was me. But that’s because I already have a lot of good red offense raised up, and what I need is support to keep them alive. Grazul helps greatly with that.
So that’s why I say, it depends on what you’re more in need of.
I’g go with Marj. I have both. Grazul emblemed lvl 9… and a bit disappointed.
In defense, the AI doesn’t help. She has to be human controlled to be effective. And even then… in offense, I sometimes try to sych her special to block GM, Zeline, Drake, Onatel, etc… and fail because of bad unexpected tiles cascades. I realize that fast dispell is better. So I’m back at using Zim much more. Maybe I’m to blame. I’ll try Grazul a little more, but I’m not convinced.
She may have a role in a red team, but apart from that… meh. Sadly.
I have 2 GraveMaker, Mitsuko all 4-80.
Elena, khagan, qoh, guradian kong 1-1 and dupicates of all of them and few more marjanas
You have way less need for Marjana with Gravemaker x2 already 
She’s basically just gonna be useful for wars and one class quest (Shadows Trials, since Survival your 2 Gravemakers are allowed).
I’d go with Grazul just based on that.