Now this entry is extremely unique. There is a lot that one can take from it as a follower of the series.

For me, 'The security Book' is something she knows that will always have the same things on the same pages each time she opens it. It serves as a 'ground' to remind her that there is consistency in a world filled with so many unknowns.

I can imagine some flashbacks showing us how this habit started and how, perhaps Sky Sparkle, validated her need for a book to keep in bed with her. One bad dream could throw everything way off. So waking up to see the book is still showing the same facts could easily help her self-soothe and return to rest.

The need for wearing glasses, even in bed, is also an issue of security. I would guess, through growth in the series, she will come to not need to wear her glasses to bed. This would, likely, come from the security she builds through friendships that make her feel less 'vulnerable' while she gains more control over herself and the world around her.

"always have the same things on the same pages each time she opens it" -- I didn't think about that detail. I will have to remember that.

I should give more thought about the contents in the book "The Magic of Science". White Night and Skysparkle have worked as a team to help Nightlight be a healthier version of herself -- in the way that Autumn Blaze taught the kirins.

I think about how the kirins wanted to be a peaceful race -- but they did not know how to control themselves and have a full life. They learned that who they are doesn't have to be a bad thing. With the right attitude, there is a safe way for them to explode if they really feel the need to. That story really struck a chord with me, as one on the autism spectrum.

I really enjoyed how the finale showcased the friends of all races the Mane 6 had made over time. The ruler of the kirins also made an appearance, and (as I recall) the epilogue showed kirins in the School of Friendship.

As a powerful unicorn, Nightlight can learn to use her horn to help her detect her surroundings. Before she masters that, however, I would want her -- now that you mention it -- to become more confident in being able to see only a fog of color. I don't want to cop out on that part of the character development.

I should note that she has a true need to see what is in front of her. But I'm sure you understand that. Her first opportunity to take care of a creature has been Phoenix the little dragon boy. She has often been unappreciative of his efforts to please her, but he has always had White Night and Skysparkle to praise him. Having to be led by Phoenix would be a crucial bonding moment -- not just with him but also friendship in general.

Unlike Spike, Phoenix would be insulted by the title of "#1 Assistant". It would make him feel like a second-class friend. Overall, he has more self-confidence than Spike, and he can charm others into taking his side over Nightlight's.

As part of his desire for popularity, Phoenix starts to enter a stage where he likes to make Nightlight feel like a social outcast. This plot arc is to send the following message: Much that we call social skills is actually socially accepted norms. In fact, people are notoriously bad at connecting with one another -- not just Nightlight. It's just that Nightlight has had little ability to manipulate people except by open intimidation. Someone had to reach out to her first -- rather than expecting her to automatically pick up what others do. Automatically picking up what others do isn't necessarily a good thing anyway -- it's less about social skills and more about herd mentality. She tends to be less prone than others to blindly follow what others do.

Phoenix might deliberately sneak off with Nightlight's glasses as a way to make her appreciate him more -- or as a ploy to make her a laughingstock. Nightlight has little choice but to follow his lead. When he makes jokes about her needing him as a seeing-eye dragon, he starts to anger too many people. His popularity is starting to crumble under his feet.

Finally, he feels that everyone has turned against him. Feeling bereaved of his sense of identity, he finally explodes into a giant tantrum. He has now become a giant greedy monster. Nightlight tries to fight him -- but she cannot see her target. Her mentor Starlyre reminds her of how her brother once stopped her from being a giant angry monster. Starlyre tells her she doesn't need to see with her eyes -- but with her heart.

Instinctively, she picks up where Phoenix is, and she floats in front of him like a guardian angel. Nightlight is the first to apologize. She wishes she had been a true friend for him. She was the one who hatched him, but she failed to be the mother his baby instincts would have expected. She wants to be his friend now, but she fears he no longer wants a friend. He became very popular, but he ceased to have any true friends -- because he was no longer being a true friend himself.

Phoenix finally explodes in grief. He is back to normal size, but he is now stuck in a deep hole in the street. Finally, Phoenix sees that he thought so much about popularity that he forgot about friendship. And now he's the one about to be a social outcast. If he doesn't regain true appreciation for the goodwill of others, he will find himself in a great hole he cannot get out of.

He starts by faithfully helping Nightlight find her way around. Unfortunately, her glasses are broken, and it will take some time to replace them. He will also have to help guide her when she is helping him make up for the damage to buildings and the streets.

(You might have noticed the references to "Equestria Girls 1".)

Now that you mention it, I do see some similarities to Sunset Shimmer and what she becomes through Twilight's crown.

The arc of Phoenix here is far deeper and would work well as its own set of episodes, chapters, or entire book. You have the start with Night Light and Phoenix. Phoenix faithfully does what any baby would do, which is strive for attention by pleasing the parent figure. Night Light, unfamiliar with how to provide the necessary 'emotional return, causes Phoenix to see some 'bad examples' of 'attention' and thinks doing them will get him what he wants. Unfortunately, as we near the climax, he gets so carried away with the 'new attention' he is getting that he fails to see he has been manipulated to be going about 'negative attention seeking behavior'. The reality hits him like a ton of bricks, causes his own 'explosion', and Night Light needs to deliver on the overall lesson of how both of them made mistakes but want to do better going forward.

The end, of course, being the noted efforts of Night light and Phoenix to repair the damage done to the town.

So, overall, the whole arc is a book in itself. You have a situation, escalation, climax, and conclusion that shares the lesson while forwarding the tale as a whole.