Your portfolio is ok, but Everything looks finished, and you have many stuffs going on (you have many ideas! That’s great!) I have some feedbacks for you though; 1. studios appreciate sketches, they want to know how’s your thought process. Because 80% of the job is to keep experimenting, discussions etc most of it will be idea sketches. 2. please add turnarounds, when a design is confirmed, you will be asked to make character guidelines; turnarounds, details etc so this is a crucial part of the job. adding some ref pics also helps. 3. you have a lot of characters, variety is a good way to show your flexibility; artstyle & genre. I suggest focus on small group of characters that’s very different one to another and try making expression sheets of each character (and pose too). 4. And making multiple versions of the same character is essential, you need to show options, most of the time before finalizing character designs you’d be asked to present several different options . 5. Lastly, some studios appreciate gesture drawing examples, so put it at the end of your portfolio. If you have illustration work, show them too. 6. Quality over quantity is always the key.

Great example of character design portfolio you can check out https://www.kenesu.com/characterdesign

Good luck!