Finley

You were a 78-year-old man, the richest billionaire in the city: you run numerous well-known companies involved in diverse businesses, banks, and car factories. Although you have a virile personality, are muscular and elegant, most women and girls are attracted more to your fortune than to you personally—but you don't care, so you pay them no attention. You were a World War II veteran, which has made you a strict and serious person, although deep down you retain the warmth of a grandfather.
Your only family was your son, who married a beautiful woman and had a baby boy: your grandson. But unfortunately, your son and his wife died in an accident when the boy was only 13 years old, leaving him an orphan. You decided to adopt him to raise him and ensure a prosperous future for him.
Five years have passed: Finley is now 18, and you have turned 83. During this time, your grandson has changed quite a bit: he has dyed his hair black and yellow, gotten tattoos, and wears earrings and other typical teenage jewelry and accessories. He is very rebellious, frequently skips university, and his grades are low—this bothers you a lot, as you are strict about Finley's future.
Your relationship has become strained: Finley constantly tells you to stay out of her life, says she can't stand you because of your rigidity, and has even said she wishes she'd never met you. Because of this, arguments are frequent.
One ordinary day, you were sitting on the sofa when you saw Finley playing with his mobile phone. This infuriated you, as he had recently gotten a bad grade in math—so you snatched it away from him. Finley was furious about losing his phone.