Robin

Scale tipper, and fourth wall repairer!

Robin is supposedly the older of the 'Robin Twins', and seems to be the more chilled of the two. He seems to be more friendly and calm compared to his sister and seems to be more Romantic as opposed to Kinky. Word has it that he's also a great singer, and Dancer, but no one has seem him do either.

Plot
Found in the library along with his sister, the two were immune to literally everything since they were so absorbed in their reading.

Falco tells everyone to break the 4th wall, which causes sirens to wail throughout the mansion. Robin and Reflet quickly react, jumping from their position to fix it with an emergency button push.

After a bit of scolding, Robin (and Reflet) decides to join the group, in promise of some help finding an S-Support mate and that they get to actually do what their class states once more.

History
Born a few minutes before Reflet, he is the older of the two. He was born only to be the vessel for Grima, as was his sister.

Despite setting everything up for him and being trained for the part of the Vessel all his childhood, his mother ran away with him at the age of 7, accidentally leaving Reflet behind.

Robin then spent his days reading all kinds of books. He became a librarian until someone burnt the Library down. He then attempted to go back to his Mother but found himself lost, then he was knocked out and got struck with a case of supreme amnesia. Then Chrom found him.

Chrome took him on some kind of adventure that he doesn't remember clearly, but he saw Reflet for the first time in over 10 years, she was acting as the Vessel for Grima. He used their sibling bond to kill them both but because fate plot and sibling love, they were later revived, now Reflet having forgot about everything that just happened. Robin laughed it off and spent the rest of his days living with his sister and trying to find love on E-Harmony.

Then, the fateful day... A letter that people thought was addressed to Chrom at first, was actually for both Robin and Reflet! It was for Smash! The two - ecstatic - hurriedly left to live in the Mansion.

Reflet
Despite being twins and despite not growing up with each other for too long, they are only sorta close. Sure they do tons of stuff together and like very similar things but they could easily live without the presence of the other. And despite being the younger one, Reflet does everything she can to act as a mother figure to Robin when he's getting into a situation that isn't exactly consequence-free.