Notes
This little gremlin is a monster when it comes to both single-target and AoE magical damage, so there are definitely a few options when it comes to building her. I personally like to have both Chuu Chuu Chuu! and BOOOOOM! on her, as well as NRG Restoration (to feed her intense need for NRG), so she can be flexible, depending on the situation.
You can opt to give her Flaming Meteor instead of either of the two attack skills, but if you’re going to run Meteor, I recommend using Inanna so she can fire off the meteor on the same turn.
For gear, in the interest of flexibility, I recommend the Starry Sky Heritage, but if you’re going pure AoE, you can opt for Diffusing Prism or Resentment Broom. For trinkets, I’m assuming you’re bringing BOOOOM!, which doesn’t allow you to move before using it. The way around this is to use an [Instant] skill after moving. All three recommended trinkets accomplish this, just be aware of positioning your other characters before using Space-Time Ring. Because moving before attacking isn’t always the best thing for her, you’re better off going with cup + sword engraving. When rolling for stats, aim for M.ATK.
As a side note, her Flame Wall skill can be very handy on stages where you need to inflict DoT damage to enemies, or just for making a bunch of [Scorch] tiles to slow down enemies.
As an additional side note, if you’re ONLY interested in having her act as a single-target DPS, you can use Focus Wand as her weapon and bring Try This! for her second skill slot.
