Attack On Titan
Death Note
One piece
TQQ
Demon slayer
100

What is the name of L´s successor?

Near/Nate River

100

What is the name of the devil fruit that Luffy ate

Gomo gomo no mi(gum gum fruit)

100

What is the name of the five quintuplets

Ichika, Nino, Itsuki, Miku, Yotsuba

200

What is the name of the hashira that uses serpent breathing 

Iguro Obanai

300

How old is Eren after the time skip

19 years old