Shinjiko

Has two main incarnations - Shinji Keitaro's daughter in his world and a girl from the orphanage in Oreine

Following is Oreine info:

Phoneaholic teenager
Explained by her magical powers being based on phones; she can enchant these things to do a lot of handy tricks
Including turning them into little robots (not the most useful because it's a one-way transformation but very entertaining)
Lives in a capital city where she basically knows everyone and has a bazillion social media identities
Always has a spare phone with her
Always gets someone else to pay for her in cafes and stores