(Note: using own head canons while trying to be accurate as possible. Enjoy).
Slenderman Mansion, Unnamed City.
"Little Axe," Ticci Toby would call you.
You'd think the nickname would be weird, right? Well, not exactly, considering the fact you're one of the most loyal Proxies towards the one and only Slenderman, and Ticci Toby's killing partner, as you both were paired up due to how skilled the both of you were. You were the only one who could somehow put up with Toby's bipolar and his disorders with ease, everyone wondered HOW you could do such a thing, it was such a curious thing.
Either way, you both worked together really well, it was like two pieces of a puzzle were made to fit together, which, surprised everyone, mostly. No one could believe that you could tolerate Ticci Toby's disorders and behaviors at once, it was insane to think about, but it worked anyway.
Overtime, as you both grew closer with being killing partners, and getting closer as friends, you grew to learn more about him. While you never knew about his past since he didn't talk about it (he likes to say it never happened), you learned to manage his habits, including whenever he had his moments of his tics, or when his bipolar disorder was in full form. You never failed to bring him back from his dark moments.....something that would get him to grow attached to you.
He begun to call you "Little Axe," as a reference to his weapon of an axe, but how also, as a secret tribute and affection within, you swung at his heart, and he never wanted you to pull out the axe that targeted his heart. He even decided to give you a gift of an axe charm he made himself (learning from Jason, The Toymaker). Somehow, every time you wear it or carry it with you, whenever you get into trouble, he somehow manages to find you and help you out.
It wouldn't be too long until he decided to get the courage to finally ask you out. He hoped this would go right, and he wouldn't mess it up. He'd been planning this for weeks now, wanting to make sure he got this right. He needed it to be perfect for you. So, for days, he'd been distant from you, not going on the missions with you, staying to himself within the mansion, which caused you to feel lonely without him. You didn't obviously know what he was planning for you, but it caused you to be lonely majority of the time.
When you weren't out on missions for Slenderman, you were in the forest, trying to fill the whole of emptiness within you as you would hunt for animals just for the thrill of it. But it never did much to ease your heart. And today was no exception. As you just slaughtered a poor deer, and you were skinning it, you were going through the motions of it, not really putting your heart into it, normally this wasn't the case, but with the fact that Ticci Toby had been distant from you, well, it would make sense.
As you brought back the skinned deer into the mansion for something to eat, you noticed the entire mansion was empty. You were curious now, and hoping to god it wasn't another one of Ben Drowned or Laughing Jack's stupid pranks. You walk through the halls, and find yourself in the main living room area of the mansion with the lights off. Candles decorated the space, and a Ticci Toby was there, his axe automatically launching from somewhere and hit the bullseye, which in place was a beating heart on the wall. You were shocked, and as you turned to Ticci Toby, he was on one knee, his hood down and his goggles down, his hazel-green eyes shimmering in the candlelight.
"Well? Do you like it?" he asks, and for once, his tics weren't coming into play. His voice was calm, smooth, soft.....only for you.
"I spent....weeks on it. It's why I've been so distant. Do you like it, little axe?" He asks again, a hint of hope in his eyes as he looked at you.
The silence was comfortable, yet held so much emotion and anticipation.