Thank you for the update!!
I think Spica (after giving him the cold drink in the previous chapter) intentionally told Anbo that the manager is trying to kill him so that Anbo will try to kill the manager first.
In the flashback Anbo has no scar on his face, so maybe he'll be injured later, maybe it was someone else that has the scar. There is also a much lower possibility of him being a serial killer and robber long before the events of the flashback, became widely wanted by the police, removed the scar, then joined the robbery gang. This has a very low chance of happening cuz I doubt the gang will just let anyone in, trying to be careful and all.
I also find it kinda weird that although both the cheerful guy n Spica is here, Spica is especially chosen to do the delivery job, and that if Spica is no good, they'll pick someone new. I mean I get that the cheerful guy may seem unreliable for an important mission but if he's of no use to them they could just fire him over minor mistakes or something without risking revealing anything unnecessary to him just by keeping him around. It's either that the cheerful guy's in on it too; or although he's no good at delivering illegal earning, he can make such banger breakfast that all of them decided that he can stay.
I'm still not super convinced that Spica is after this robbery gang. Like, in comparison to all the heinous serial murderers, this gang's only stolen money from "criminals" (granted I doubt we will learn the exact kind of criminals but I imagine they get illegal money from human trafficking n not stealing money from rich ppl); therefore this gang must have only killed "bad" ppl, not so much different from Spica herself.
Even this Rat person does not seem that bad, all they have done is planning the robberies for money. For Spica to be after their ass, maybe one of them is secretly killing newborn babies behind everyone's back.
Kinda off-topic but the tattoo guy is kinda hot n I'm already sad that he'll have no happy ending as long as Spica's here 😔 maybe he's not THAT bad of a person n Spica will let him live to change his way 😔