Oh my gosh! I thought I was the only one who ONLY had their personification with numbers! It feel amazing to know you're not alone in this. But, my numbers also have elaborate relationships in my mind, AND favorite things (favorite color, favorite hobby). They on;y go from 0-9, but I like to decode the higher numbers so they can have personalities, too. My numbers go like this:
1-three years old, female, forgiving, favorite color is pink, loves to jump rope. Sisters with Two.
2-twelve years old, female, nerdy, favorite color is emerald green, loves books. Sisters with One. Likes Three
3-thirteen years old, male, shy, favorite color is brown, best hider. Brothers with Zero.
4-sixteen years old, female, care-free, favorite color is sky blue, loves her car. Likes Eight.
5-eighteen years old, male, kind, favorite color is purple, loves to help others. Brothers with Six
6-ageless demon, male, evil, favorite color is red, loves to terrorize Three and Nine. Brothers with Five. BFF- Zero
7-twenty years old, female, happy, favorite color is light green, always wins lottery, millionaire. Engaged to Eight.
8-twenty-one years old, male, proud, favorite color is gray, loves money. Engaged to Seven.
9-fifteen years old, male, paranoid, favorite color is canary yellow, hides. Has awkward relationship with One.
0-ageless, male, bully, favorite color is black, loves to terrorize Three and Nine. Brothers with Three. BFF- Six
That is a more condense version of them, and (this sounds a little crazy) sometimes, I take my color pencils, take all of their favorite colors (One is pink, Six is red, etc) and play games like that. And, sometimes I wish I had another type of synesthesia, and then I feel really guilty afterwards and apologize to each and ever number. I don't feel guilty while doing math, and then I feel guilty for not feeling guilty about pairing Six and Nine (weird, right?). I hope your life is filled with the wonder of synesthesia for as long as you live!