Inazuma Eleven Go Chrono Stone - Extra story

Tsurugi's dark side?

Tsurugi: it was something I got when fighting against foes through time...
Kinako: ... through time it seems evil though?
Tsurugi: well, after losing to The second stage children's team during the time we were on protocol omega's side.. they put something inside of us all who lost in that fight... not to you or Tenma or fei or anyone just to the one that lost. I'm still unsure of what this power can do but I can control it I think... you probably didn't know but I was evil back then  too so it shouldn't be that hard to handle for me.
Kinako: That was a lot... why didn't you tell anyone??
Tsurugi: it isn't that much of a burden for me and I didn't want to bother the team...
Kinako: Still we're friends it's important to share that with your friends!
Tsurugi: ... you think?
Kinako: yeah! Definitely!
Tsurugi: still... it's not that important seriously.
Kinako: Come on let's tell the team about it! We're absolutely going to help you!
Tsurugi: suit yourself then... but just know it's dangerous...
Kinako: dangerous..?
Tsurugi: yeah, dangerous. I've read that if you don't eliminate this thing inside of me completely which is hard by the way then it'll go into the purest human that's near me so watch out, just saying...
Kinako: Don't scare me like that! You're just joking, right?
Tsurugi: ... find it out yourself... I'm just saying..
Kinako: Come on the others are waiting!
Tsurugi: All right let's go...

(With back then I meant the time before Tsurugi joined Raimon and worked for the fifth sector)