
Kinda sounds to me like you've written the character into the corner of a silo that she needs to be broken out of now, because the silo no longer suits her, which isn't something that's terribly hard to do, thankfully! Hopefully I've got the right general idea here of your problem.Â
I would suggest finding some linkshells with a similar vein to Yul, or even creating a Making Connections post for her with what you'd be interested in trying to find with her (possible directions, ideas you've got, and the like). If you lack ideas entirely, then just throw her out there and get her interacting with other characters. Those characters may give you some ideas, or even give Yul some ideas directly. With a wider range of contacts and networking, you'll have a lot more doors open and a lot more directions to go with her, and you can avoid getting trapped because Yul betrayed a particular niche.
I would suggest finding some linkshells with a similar vein to Yul, or even creating a Making Connections post for her with what you'd be interested in trying to find with her (possible directions, ideas you've got, and the like). If you lack ideas entirely, then just throw her out there and get her interacting with other characters. Those characters may give you some ideas, or even give Yul some ideas directly. With a wider range of contacts and networking, you'll have a lot more doors open and a lot more directions to go with her, and you can avoid getting trapped because Yul betrayed a particular niche.