I tried doing this with the shading of her color, but I failed badly. I didn't feel like drawing herself as a 4-7 year old. So anyway. Here's her description.
Rainbow Flames is the age what's up above. She's a little bit of herself when she was four. But at this age, she's a lot different. Flames is rebellious and a brat. She sometimes won't listen to what ponies say. She spends most of her time in the Everfree Forest alone, and with her friends. Also, she still acts childish, but she can take her responsibility seriously. She'll blame herself if she does something that upset someone, and give herself harsh punishments. Even when she holds a meaning for suicide herself. She wear headphones to almost everywhere when she listen to music. She's still shy and sensitive with her feelings, but try to stay strong.