I know Ragna social skill is dead in the gutter but he keep talking to himself so one-sidedly to confirm the past untraumatized version of his master is really his master instead of using basic thinking of cause and effect.
Like the personality of of a normal person in their childhood is completely different when they grow up,
especially even more so when they gone through something that completely destroy everything, they base their value on and define their identity from.
But then again considering Ragna personality I guess that not so surprising considering his current personality is the same as when he was a kid that survive every dreadful encounter that kill everything but him....
Well I guess it is a little bit different now but still the same