Silver and Blaze/Team Dimensions third Member options
Blaze’s sidekick, talked about eloping with Silver in Otherworld Comedy (yes, seriously)
Semi-formed this team in Amy’s Fortune cards
Archie Marine made a Silvaze fanfic in an Off-Panel comic (weirdly Game Marine possibly ships herself with Silver in Otherworld Comedy)
The most popular third member with fans by far (personally Blaze and Marine are the Sol Sonic and Tails so they should have a Sol Knuckles instead of jamming in Silver IMO, and in the fandom this team either tries to make Blaze's cast into Silver's or Silver into part of Blaze's instead of giving him his own/doing anything with his world, I think fans underestimate how connected Silver is to the Future)
Fans usually assign Marine as the missing Power Type but Marine is either Speed (runs fast like Sonic in SRA) or Fly/Technique like Tails (No, her water powers don't make her a Power Type). If she was their third then Silver and Blaze would possibly be their Sonic Runners Types (below)
Rating: Possible, but tied to a lot of fandom headcanon things you shouldn't expect from the Sonic Team versions
Fits Team Dimensions’ theme by being from another different world
Acts as a calm counterbalance to how fiery and headstrong Silver and Blaze can be (which would let Blaze be fiery again instead of her just being the stoic one that has to calm down Silver)
Fits with Silver and Blaze's themes of guardianship and duty
Has a celestial Sun (Blaze), Moon (Ariem) and Star (Silver) theme with them
Fits Silver and Blaze’s dreamy blue and purple heavy color palette as a group
Potentially represents a positive version of Mephiles (otherworldly blue entity with stilt legs) and his affiliation with Silver and Blaze in 06
Rating: Likely given their current team name and how they're grouped together on Sonic Channel
Has gold eyes like Silver and Blaze
Gives a chill and comedic counterbalance to Silver and Blaze being overly serious
Formed a team with them in Team Sonic Racing and some Mario & Sonic games but in those they didn’t want to be a team and were only together to pair spares (yes, they essentially say that in their Team Vector interview)
Rating: Probably not gonna happen again, Silver and Vector have a good dynamic though
Roughly the same age as Silver and Blaze (referred to as the Microwave Kid)
Married Blaze and seems compatible enough with Silver so they could form a polycule (jk)
Would have the dynamic of being a normie character on a team with two of the least normal cast members
Would be the only one that can cook (Silver and Blaze can’t cook to save their lives)
Rating: Worth exploring but not likely to happen
14 years old like Silver and Blaze and has a similar power level to them (She has strength/shaman powers like Knuckles in the Sonic Adventure multiplayer modes so she could fit their missing Power Type)
Fits the fish out of water theme by being from the past while Silver is from the future and Blaze another dimension
Shares Silver and Blaze’s belief in peace
Rating: Worth exploring but not likely to happen
Amy and Mephiles honorable mentions
Both were Silver and Blaze’s semi-third members in 06 (and Sonic Team loves calling back to 06)
Amy is close friends with both Silver and Blaze and strong enough to qualify for Power Type (Power Type is about physical strength and being able to move heavy objects in gameplay)
Mephiles is on the Future Team Type with ESP Silver in Sonic Runners implying they’re some kind of team (???)
Rating: Amy has her own team when she’s not the fourth member of Sonic’s and Mephiles is a god-demon thing that hates humanity so they aren’t real options