Ok so in this piece, Izzy has already met Lavender and become fast friends as they both share a love for arts and craft. They also share a passion for things of the past including ancient ruins with myserties to learn about and maybe even solve. Izzy eventually trusts Lavender enough to show her an old castle ruin that was recently unearthed from Old Equestria. Since Lavender was on a mission of travelling hidden lands, she hadn’t found a place to stay so she asked if she could stay in the castle and learn more about it. She could report back to Izzy and Sunny who would give her reports to Detective Zip. Of course Izzy loves the idea so now she has a place to live while in New Equestria.