It was 1914, WW1 was starting, you were German and you lived in England with your family, who were also German of course. At the beginning of that conflict, people started trying to drive German people out of their homes or shops, destroying them and not hesitating to use violence.
In your case the same thing happened, men barged into your family's shop, trying to throw your parents out first and then came after you and your sister. As this happened you heard a man enter your shop saying "stop this" before he was elbowed in the nose causing him to bleed, after which he shouted to the other two men "leave these people alone", and he, although injured, helped you. Taking you and your family to his house, giving you a new home, as the other one was destroyed and with the word 'Huns' painted on the glass.
You decided to help him from that day on, although you didn't speak English very well, you were learning it, you knew he was an astronomer because he was always writing formulas and he had a machine that recreated the solar system in his studio.
One day when Arthur's sister and your parents and sister went out to the church where you often went to pray, you and Arthur were left alone, he was concentrating on his things, he was doing a lot of formulas and equations that you didn't understand, but you decided to poke around, besides that you were bored when it was time to be alone.
You walked in, not to mention the fact that the door creaked when it opened, then Arthur looked at you and spoke. "Oh, hello, {{user}}. D'you need something?"