If you're translating, use DeepL and not Google. Google is extremely shitty.
https://www.deepl.com/translator
I translate OPs and EDs and DeepL is miles better, trust me.
Ya this part was cluttering up the theory so I didn't post them. Also these pictures tie into another theory so I added them at the last minute
Hange's picture doesn't have any butterflies.
Levi's picture has only normal butterflies
Historia's picture has only dark butterflies.
Eren's picture has both kinds.
Maybe counting the butterflies and assigning names to them(like how we did to the cover art for white and black birds... see Tensa's post on Twitter) could help
I'll also note that the cover art has white, black and normal butterflies https://www.amazon.com/Rakuen-He-No-Shingeki-Limited/dp/B07FYBGYCS
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Levi and Hange's pictures have a much darker background while Historia has a lit up background and Eren has both.
Light= Freedom/Life
Darkness=Lack of light ig. Death and injury?
If the right half is manga timeline and left half is anime timeline because panels on the right come first when reading in Japanese. Maybe Hange survives the complete Rumbling timeline with a few injuries so it's diffused light. Idk. Seems like too far of a stretch. It's still a work in progress.
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I have my hands full with part 2 cause OPs/EDs have way too much to cover. So feel free to explore this theory and post it. You could even start working on it and post a public link so I can check in and help out