I'm gonna just take the bratty part away from Hizani, and just have her be a confused bean that talks like 
"Okay." 
Kind of Personality 

Oh and this is gonna be when she first meets Ms. Joke

---------------------------

Hizani was watching TV, not fully understanding what was happening, but was trying her best. She had seen a mother with her daughter, the mother brushing her hair and just spending time with her. "Hmm..." Hizani hummed softly, tilting her head a bit. Aizawa walked into the room, looking at the TV. "This show might be a little complex for you right now..." he said, seeing as it was a thriller-mystery. Hizani then looked up at her. "Hey um, Dad, in this show, that girl calls the woman 'Mommy', what does that mean?" she asked, tilting her head. "Oh, uh...that's another name for mother, which is usually another parent. Sometimes there's a mom and dad, though there are times where you have two moms, or two dads, though traditionally it's a mom and dad," Aizawa explained, not wanting to confuse her too much. "Hm...I don't have a mom, though, that's because I was made in a tube with your DNA, right?" She asked, looking at him, he nodded. "Hm...I wonder what it would be like to have a mom..." 

The next day at school, when no one was in there, Hizani had left a note saying, "Class, meet after school is over. Aizawa." Thanks to being almost the same as Aizawa, her handwriting was very close to his. When the students saw this, they were curious as to what it was for and stayed after class. After a little while, when Aizawa left, Hizani went in. "Hi. I'm Hizani, I'm sure you all know about me, yes?" she asked, standing in front of the class. "You're Mr. Aizawa's daughter, well...you were made by his DNA and really a nomu, but because you seem young, you're like his daughter-" Midoriya started to mumble before Koy covered his mouth. "Yes, we know," he said, Midorya blushed and looked away. "S-sorry for rambling..." he said softly. 

"Well, since I don't have a mom, I want to ask you all individually what it's like having a mother of sorts. I will come to you and ask. I'll start at the front," Hizani said, holding a notebook with a pen, going and talking to them individually, starting with Ayoama. "So, what is your mother like?" she asked. "She's very supportive and makes me feel like a shining star!" he said, smiling at her. Hizani nodded, writing down what he said. "Thank you," she said, going down the line and asking questions. 

Soon she came to Kirishima. "Does your mother usually take care of you?" she asked, putting the pen on the paper. "Yeah! She's such a manly woman! Not that she's like a man, but that she's amazing and so lovely!" Kirishima said with a grin. "Hm...manly...interesting..." she said, writing his words down. After getting through the next row, she soon talked to Koy. "Doe-" 

"Which mother do you want to know about?" Koy asked. "Oh, you have two mothers," Hizani said, writing that down. "So, how do your mothers treat you?" she asked. "Well...mm, one mother isn't really a 'mother', but she kind of adopted Kay and me, and took care of us so much better than our birth mother...our adoptive mother showed us love, and actually wanted us to just be happy..." he said softly, Hizani wrote what he said. "Hm...I'd ask about your other one, but...your expression and tone show you don't like her, so I won't ask, thank you," she said, walking and talking to the others. 

"Has your mother ever done anything that was wrong?" she asked. Todoroki blinked slightly. "Well...she poured hot boiling water on my face...that's how I got this scar..." he said, looking away. "Hm...okay..." Hizani said, writing it down. After talking to a couple of others, she got to Bakugou. "How much time do you spend with your mother?" 

"Pff, I don't spend time with that hag-" 

"Bullshit, you don't! What about when you two went to lunch last Saturday?!" Koy asked, Bakugou growled. "Or when you two had a movie night when we were out with Papa?" Kay asked. "So...you do spend time with your mother...?" Hizani asked, being confused. "Grr...yes, I do, okay?!" he yelled, huffing, Hizani wrote it down. She soon finished. "You may go now. Thank you," she said. 

She then went home, and sat on the couch, looking through her notes. "Gentle...caring...always helpful...gives hugs... make them laugh...mothers sound similar to fathers but...more gentle..." she said, reading through a bit more. "Hi, Hizani," Tirean said, going and sitting next to her. "Oh, hello, Tirean...you have a mother, right?" She asked, looking at the little girl. "Uh...yeah...I'm going to see her later today, why?" She asked, tilting her head. "D...do you think if I asked her...I could spend time with her as well...?" she asked, being slightly shy when she asked. "Well...I suppose so, she's very open-minded," Tirean said with a gentle smile. 

After about 15 minutes, Ms. Joke arrived. "Heyy, Tirean!" she said with a grin. "Hi, moma," Tirean said, going and giving her a hug. Hizani walked in, feeling awkward. "Um...hello..." 

"Oh! I don't think I've seen you before!" Ms. Joke said with a smile as Aizawa walked in. "Oh, hey, Joke, this is Hizani, um...you know how the LOV makes Nomu and such? Well...she's kind of that, but has control over herself, and they used my DNA, so she's essentially my daughter as well," he explained to her. "Oh! I was wondering why she looked like you! Here I thought you cloned yourself!" Ms. Joke said with a laugh. 

"Um...ms. Tirean's mom...can...I spend time with you? You see, I don't have a mother and...I want to know what it's like to have one...I know you two usually like to spend as much time together as you can, but...please? I just want to know what it's like," Hizani said softly, having a soft expression. "Aww...of course! You don't mind, Aizawa, right?" Ms. Joke asked, hugging Hizani, Aizawa shrugged. "Just as long as she doesn't destroy anything, and no avocadoes, she has a weird allergy to them," he said. Ms. Joke smiled, taking Hizani and Tirean by the hand. "Come on, girls! Let's have a great day!" she said, Hizani smiled softy. 

"Okay...Mom..."