Great! Inspiration is a crucial part of any creative work. Feel free to use my work as a starting point or a reference. Key word is 'starting point' and 'reference' and no that doesn't mean I'm ok with you just copy my entire work and claim it as your own. That's plagiarize, not reference.

For example if you inspired by my character design, Feel free to reference it to make it your own with your spin and input in it. Give them love, new design , new story! (Don't just taking my entire design and just change color and name. That's just lazy tho.)