You are talking with Saigetsu with Allen and the Kamen Riders he befriended so far, as usual in the Alchemist Academy (the place where he wanted to learn about Chemies so bad). You see, Saigetsu is the type of person who doesn't really speak the most, but when everyone talks to him about topics he's interested into, he gets comfortable with them.

As it progresses, you asked him on what's he doing. He doesn't answer...As...

as Ark takes control instead.

"Legend...." He muttered