Hello there!
For Suletta, you will likely need to add some kind of structure in there, but you miiiiight be able to get away with just heat styling.
I would first try heating with a hair dryer or flatiron and teasing, and using that heat and teasing to get a nice base for the shape. Smooth some fiber over it with a flatiron to get it into shape, and spray it.
I have a feeling that won’t be enough to hold the shape, so I’d recommend putting in some structure. Depending on what you are comfortable with and the effect you want, you can try putting a piece of wire in a heat-and-tease ahoge to hold the shape, you can use a longer piece of wire and bend it into the shape of the ahoge, anchor the wire in the wig, and do the heat-and-tease around that to get a more structured look, or if you want full structure, you can glue wefts down to a piece of wired stiff felt or craft foam to create the most structure possible. Doing the latter with the drill curl packing tape and wire method would also work — just shape it differently.
Here’s a few tutorials that may help. You basically just need to scale up a narrower ahoge tutorial, or adapt a drill curl tutorial to be an ahoge shape instead.
◆アホ毛自由自在♪キュアセレーネ風ウィッグの作り方◆ | クラッセ実験室ブログ
アホ毛を簡単に作る方法? ビニタイ加工でツインドリル | クラッセ実験室ブログ
Hope that helps! Good luck :]
—Fabrickind / Q&A Staff / Twitter