The most relevant of what happens in the first Volume or World, in this case would be that of Sonic. We will talk about the most important moments, as well as the characters that should have more relevance as well as the respective arcs. Preferable to read before or after finishing Volume 1.
------------------------------------------------
.͇W͇o͇r͇l͇d͇ ͇1͇:͇ ͇S͇o͇n͇i͇c͇'͇s͇ ͇W͇o͇r͇l͇d͇
M͟y͟s͟t͟e͟r͟i͟o͟u͟s͟ ͟I͟s͟l͟a͟n͟d͟ ͟A͟r͟c͟
Important Characters:
-M
-Carmis
-Amy
-Blaze
-Zeta
-Rouge
Important events for the story:
-The Magic Book will influence a lot for later in the story, but more for bad things than good, it is not yet known which original world the magic book is from, but the power it contains and its knowledge in the wrong hands will put many worlds in grave danger. There are only 2 users in the whole story who possess such a book and manage to get the most out of it.
-Also emphasize the first steps and childish way of acting of the protagonist, he still believes to be at the peak and the confidence that he is the most important, so his base personality is radically changed from the beginning, let's say that he is forced to act as if it were another life, but with the passage of time he would find and even mature, the beginning of his change would be from World 3 or Volume 3.
----------------------------------------------------
W͇o͇r͇l͇d͇ ͇1͇:͇ ͇S͇o͇n͇i͇c͇'͇s͇ ͇W͇o͇r͇l͇d͇
P͟a͟r͟a͟s͟i͟t͟e͟ ͟A͟r͟c͟
Important Characters:
-M
-Parasite
-Blaze
Important Events for the story:
-Here we are already introduced to the parasites, beings that as the only goal in their life is to collect the most power to give it to their father, in the first volume it does not expand beyond their origins or what they are, but they do prove to be that they are very scary and dangerous, the parasite that appears at the beginning of the story is not even the beginning of what the father wants to get with them, it could not even be considered prototypes, they are the most basic thing that the father could create to begin to collect forces, he preferred the quantity instead of quality, which he would perfect with the passage of time to recover his powers.
-The ability of light is discovered, a power that was written in the magic book, an ability that is capable of destroying pure evil and make it disappear forever, first you have to collect the pure energy of the user, and later it will be seen if you can do it to a greater amount. Take it as a Genkidama but cooler version xd, but the greater the power of the user, the stronger the technique will be.
-The first trip through the different worlds that can be done is shown, where the first one we see with this ability is Tatsumaki, having the possibility to take M back to his world, there are several reasons why M refuses, but the main one is that he is afraid, so afraid that his story and his adventure will end here, he feels that if he stays in the first world, he will live events that will not be repeated, so this guy preferred the adventures to return home xd.
-In this volume Sonic doesn't have much participation, just reducing him to someone to defeat, but I plan to make up for it when M has the opportunity to return to this world. In many passages of the story M boasts of being very fast, so Sonic would end up showing him that he was wrong all this time, if he is so fast, why isn't he able to avoid an attack that if or if he is going to hit? Sonic would teach him to be intangible at the exact moment, but this mother is very broken so I'll put a limiter xd, I don't know, I already thought of something xd, by making intangible a part of his body to dodge a hit, he would lose the ability to move that part for several minutes, if he makes his left arm intangible, he won't be able to move it and it would even become a hindrance, if for some reason he decides to make his whole body intangible, practically for several minutes he won't be able to do anything, he won't be able to move anything and he will be totally defenseless to danger. Thus reducing this ability only to key moments that he deems necessary to use. In chili I am talking about vibrations.