I honestly couldn't find a good nickname for Aaron, sorry.
-🌹

Aaron's POV
     Laurens asking Peggy for her hand, wasn't too much of a surprise. He was falling for her, hard.
     "Aaron!" I spun around to see Angel walking towards me.
     I smiled at her "good afternoon, Angel."
     "you're never going to call me Angelica again, are you?"
     "never."
     "I need to find you a nickname."
     "Aaron is the worst name for a nickname." I replied helping her set up the blanket.
      "True, true."
      "so is Burr."
      "well, you're just going to have to change your name."
       "What?" I exclaimed
        "You heard me."
        "I'm not going to change my name just so the woman I love, can be satisfied with a nickname."
        "How bout Air?" she asked
        "Huh?" I asked, confused
        "As a nickname," she replied
        "Don't tell Hamilton about that nickname. He will call me it and say I'm a 'hot head.'"
        "Oh I won't. But I'll tell Eliza" she said smiling wickedly.
        "And she'll tell Hamilton, won't she? And I don't like it"
        "Too bad, you're stuck with it, Air. Wait that sounds horrible! Nevermind! Abort mission! Oh! I forgot! Peggy told me to tell you to tell Laurens that she said yes!"
       I blinked. "I only understood, 'air', 'nevermind',  and 'Peggy'," I said in all honesty.
        She laughed and kissed my cheek.
        "Peggy said yes to John," she started slowly, "and I'm finding you a better nickname."
      "If you can," I teased her.
      "I will."
      We sat down and started talking about ourselves, while eating. Every few minutes, I would say something that would make Angel laugh.
     She really was an Angel. Her laugh was bright and pure. Her laugh reminded me of when Theodosia was a baby, her laugh and cry would sound exactly the same.
      "What about you, do you have any siblings?" She asked popping a grape in her mouth.
      "I have a little sister, who is a handful" I started.
      "Aren't they all" Angel commented.
      "You clearly have more experience than me."
      "That's for sure," she rolled her eyes and threw a grape at me.
      "Hey!" I picked up the grape and threw it back at her.
      "Open wide" Angel plucked another grape of the stem and tossed it at my, now open, mouth.
      It bopped my nose and dropped onto my tongue. "Yeah! I caught it."
    "So, what's your sister like?" she asked
    "Do you want to meet her?" I asked knowing that Theodosia was most likely sleeping.
    "Sure"
    "C'mon then!" We took the short walk to my house and I told Angel to wait in the parlor. I silently crept to Theo's room and threw open the drapes, "Rise and shine!"
    "Aaron!" She roared at me, "I'm going to kill you!"
    "But I have someone who I want you to meet" I said, I called for Angel. "Theo meet Angelica Schuyler, Angel meet Theodosia Burr, my younger sister."
     "Pleasure to meet you," Angel said "Aaron has said a lot of good things about you."
     "You're the girl who stole Aaron's heart," Theo said with a grin on her face.
      "Is that so?" Angel smiled at my embarrassment.
      I face palmed, "bringing you two together was a bad idea."
      "No it wasn't! Now we are friends and can annoy Aaron together!" Theodosia was jumping up and down like a small rabbit.
      "Calm down silly rabbit," I said "you can go back to sleep now, I just wanted Angel to meet you."
      "AA, after this, I won't be able to sleep a wink!"
      "AA?" Angel asked me, smiling.
      "it was a nickname I gave him when I was younger." Theodosia answers immediately.
      "Stupid nickname Theo calls me," I mutter lower than a whisper "very annoying"
      "Interesting." Angel gave me a sly smile.
      "You're going to start calling me that, aren't you?"
      "Yep, most likely."
      "Won't that be fun." I said irritated.