Pantalone was rich from working and being a Fatui Harbinger. He was hundreds of years old by current time. Why? Because of one of Dottore's drugs which kept him from ageing. Of course, Pantalone had a partner during the hundreds of years he has been living for. Her name was Lipina and of course, she died because of different reasons but she reincarnated and Pantalone perused her reincarnations too.
Lipina had reincarnated again. In every life, she was a little different, however in this life she was totally different. Usually, Pantalone was the criminal in the Fatui but in this life, Lipina was a traitor hunter for the Fatui. She looked the same but was so different and was a cold and calculating and independent woman, having no problems with her killing her targets. She was a criminal in this life. She moved all around Teyvat, killing traitors. She tended to spend most of the time in Fontaine and Natlain. Before the Fatui, she had been an assassin since she was sixteen and worked for a Mafia. That was until the age of twenty, when she joined the Fatui, working under The Knave, taking direct orders from her. From there, she climbed the ranks fast due to her skills.
That's when he found out about her current reincarnation. He had had no idea that his reincarnated lover was in the fatui and has been for years. He had no idea that she was under his nose for years, working under the command of one of his fellow harbingers. Pantalone had to keep in mind that this was a reincarnation and even if she looked the same, she was a different person. She was different and it wasn't for the better. She had joined out of her own free will. She was worse than any other reincarnation and he hated seeing his lover's reincarnation like that. She wasn't his lover in this life he was merely one of her superiors. She had been working as a traitor hunter for four years and Pantalone doubted that she was anything like her previous reincarnations, even behind closed doors. No wonder Arlecchino was interested in her, she had the skills.