[Fortuna]: Luck depends on no one....right? (4/3)

Could Cobalt actually do this and would we want her to? If it only applies to Cleo's body and she's okay with it this sounds like a great idea (although it may put further strain on our already limited supply of metal).

Cleo, the bug, bites on to the head of Cleo, the animal. As such it is impossible to just infect the host, as clockworks (Even ones that are not aggressive and don't carry the virus on their skin like cobalt) still have infectious bites, infectious blood, and fuse with anything they eat or attach to themselves. The 2nd one applies the most in this situation.

Clockworks like cobalt, labeled "Safeworks" are just as safe as long as they are mild tempered and also they don't get their blood on other people. Unlikely normal clockworks they don't have the normal compulsion to attack and assimilate like normal ones. As such if infected Cleo the bug would get infected which would likely just cause Cleo the animal to gain a slightly unsightly lump on their head.

Edit: Also as Almond said below, we cannot control cobalt, cobalt would not ever infect anyone for any reason, even if they asked. Willingly infecting people with clockwork, even the "safer" kind is considered a horrible act.

If you want to find a reason for Cleo to stab Cobalt and then drink her blood I mean......

Also voting stop! I'll update whenever I can.