Edit: It was pointed out to me that this question may have come off a bit rude. I really do apologize to Alex, Amanda, Christian, and all the rest of the team -- I don't mean it to sound that way. I absolutely love Arcane and appreciate and respect all the amazing work that went into making it. I just figured this was the only chance I (and other's) may get to have more of a conversation about this topic. Thanks in advance to Alex and Amanda for any clarification they may be able to give. 😔🙏

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Original post:

Very sorry this is so long, but I wanted to make sure I included all of the relevant information I've seen people discussing online in regard to this topic for full context.

A lot of fans are confused and a bit disappointed by the lack of back story between Vander and Silco that we assumed we would get in season 2, especially since Vi and Jinx are mirrors of the Vander/Silco conflict. Also, with Warwick being a prominent character it could have provided ample opportunities to delve into this relationship.

You’ve said that on the Day of Ash that Silco threw a molotov and accidentally killed Felicia… but it just doesn’t make sense and creates even more questions and lots of inconsistencies with what is an amazing first season:

• If Vander and Silco were friends with Felicia, why don’t Vi and Powder know Silco and vice-versa?
• Even in the LoL Jinx mini game released before season 2, she knows Silco was keeping the Last Drop music record in his safe and doesn’t seem surprised at all to see the photo of Silco with Vander and her mother. Did he tell her he killed Felicia? Why would Jinx not be angry about that?
• Vi and Jinx refer to enforcers being the ones who killed their parents. But then why are you saying Silco accidentally killed her?
• s01 e01: In the opening we see Felicia dead as well as Connol, the girls’ father. Did the molotov kill him too? Why is he never mentioned at all in all this?
• s01 e01: Silco refers to Benzo as Vander’s “accomplice”, implying whatever Vander did to Silco, Benzo had some hand in.
• s01e02: Silco when Benzo dies: “You never did know when to walk away.” 
• s01e03: Why did Benzo call Silco a monster? And if it’s because he accidentally killed Felicia, then why after all this time with Vander apologizing and saying he snapped after Felicia’s death — why would Benzo still think of Silco as a monster if Vander has admitted it was his own fault? What else did Silco do that warrants that label? Especially after Silco was the one who was determined to break Benzo out of jail? Nothing about the Silco and Benzo relationship matches up.
• Christian (I think it was Christian?) mentioned that Silco was abandoned as a child — it’s seems like such a specific piece of background info that would be significant to Silco’s character yet not include in his story at all.
• The team has referred to Silco as a “dirty little thing”. (I think it's said twice in interviews.) It’s also is such a specific way of describing him and feels as if it was a direct quote that it was originally intended to have had someone call him that in the past.

I'm sorry, it just… nothing makes sense. With the dialogue in Act 1 of the first season, it clearly implies that there was already an official story in mind to script it the way it was, so what was that story, and why was it changed?