Archetype: My first character in WilyRP, who was "dumped" in the desert to stumble across other characters (Borock-bot, who lead him to other Resistance members). Earlier in that introduction, I delivered a very brief summary of his backstory, and the rest of that story unravels through the interactions with other characters.
Phi: I posted a couple scenes of her conversing with Akane, stating that she planned to reunite with Archetype very soon. Instead of randomly loitering Phi around behind the scenes, doing her own thing, I immediately connected her to one of my established characters, and by extension, the main story of WilyRP.
By doing this, the reader doesn't feel lost. Instead, they feel anticipation for what's to come next in the overall story.
Heinrich von Ryker: Introduced when Akane was snooping around his facility for information regarding the Nonary Project. As Phi has referenced the Nonary Project on numerous occasions, Akane and Heinrich's conversations provide useful expositon on Phi's connection to the Project, and because of this, his introduction doesn't seem random or out-of-place.
Arche Storm: My RPM-vengers character. Though he was only introduced in a simple
breakfast scene, my very next post had Arche Storm meeting up with the other heroes to team up.