I can only assume that you want critique on what you have here. If this isn't what you're looking for, feel free to ignore and please clarify what you're looking for in your first post.
I'm going to be completely honest with you and while I don't want to hurt your feelings or discourage you from writing, this may sound really harsh.
I didn't understand most of what you wrote. Grammar and clear sentence structures may seem boring but it is extremely important. People can't give you helpful advice if they can't understand what you are writing. You're missing and misusing punctuation, most of your sentences are confusing and change from one subject to another, and you don't explain anything you wrote. I'm going to remark on some of the few points that I could make out but I suggest that you look up a grammar guide or buy one at the local book store. Pocket editions are generally cheap and easy to find. The Grammar Girl series is a very good one from my experience. She's very thorough and easy to understand and she also has a website although I haven't explored it so am not sure what's on it.
Here's an online grammar site that I often link to people just starting out:
GrammarBook.com
My other advice in that regard would be to read books. (Novels, not mangas or comics or just watching shows. That's an entirely different media and won't help you develop a judgement of good and bad writing.) Urban fantasy might be a good place to start since that's what it seems like you might be interested in. Read good and bad. Maybe you can pick up a book about writing a novel too. Or see if your favorite authors have a writing blog with tips and there own personal writing method. Try different things out and see what works for you. If English isn't your first language, get help from a professor or someone who writes in it well and read English books. But I'm afraid I don't understand what you mean by "the people don't read Spanish". What people are you talking about? Who are you writing this for?
Moving on, there were a couple things I was able to make out from what you wrote. First was that they were at a cathedral and people were staring at them. Why were people staring at them? What does the setting look like? Where are they exactly? Outside, inside, what? I have no sense of place or time here.
Next was that the protagonist's brother was a wizard and an assassin. A wizard usually means someone can use some kind of magic, but I have no idea what kind of magic. The definition of a wizard can change from culture to culture or even author to author. Some people categorize wizards, sorcerers, and mages as different things. Others say that they are just different names for someone who can use magic. What is a wizard in your setting? How does magic work? Are there other wizards? What do you mean by he cast a rare spell? What was he doing?
An assassin is someone who kills people for money. You're saying your protagonist has killed people for money. How old is he? How long as he been doing this? How did he get into this business? How has he not gotten caught? Why does he do this? Who does he tend to kill? How does he tend to kill them? How does he feel about taking someone's life? Killing people is serious business. It will have emotional repercussions on the brother as well as a big effect on his life and the people around them. How does the protagonist feel about her brother's job? I don't think you understand just how serious killing someone is.
What is a dark soul? You don't explain this at all or give us any idea of how they operate. Can other people see them? What do they want?
The mother killed one million dark souls in her lifetime. One million of anything is a helluva lot. It's unbievable, and not in a good way. Let me put this in perspective: the city of Dallas, Texas, had a population of about one million people in 2010. Look up pictures of Dallas. It's a big city. The mother managed to kill an entire city-full of dark souls.
Let's say she killed one dark soul a day. That's 365 dark souls a year. It would take 2739 YEARS for her to kill one million dark souls. Unless she nuked a city the size of Dallas, this is impossible. Even if once a year, she managed to kill a whole bunch at one go, lets say an extra 1000 per year on top of killing one every day, then it would still take her about 730 years to kill a million. My advice is to lesson the number. By a lot. Take into account whether she travels or if she stays in one area (if she stays in one area and there's other hunters like her, there won't be as many dark souls to kill off anyway). Take into account that she had to have time to meet a husband and start a family, too. And also that she probably didn't start hunting them until she was an adult, at least. Maybe she did manage to kill a bunch of them at one go, with no casualties to humans. I don't know how she might manage that because I don't know how anything in your setting works, but you don't have to make her hold the world record. It could just be one outstanding act that gave her fame and a title.
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