If any of these are not 100% your work, you need provide credits to the original artist, providing they allow for edits and redistribution of their work. If you cannot provide proper credits for all images, please remove the image.
Edits of RTP resources are fine - they simply need to be credited Enterbrain/Kadokawa. The way you worded it made it sound to me that it might have been art of someone else - which is why I ask.
Oh and one last note on it - just be sure to state which maker the RTP edits are from - because only those who own that particular maker can legally use it.