In BSD, Dazai was Akutagawa's mentor, the latter seeking for his approval as a reason to live
Here in BTA, Dazai idolise Akutagawa, especially since he saved his life and all

Anyway, he didn't appear yet, but I root for BTA Chuuya, I hope nothing bad happens to him/I

3/3

He's brave but not too much, in first ep he goes back to save Melos' friend which took the look of his mentor (Sato Haruo iirc)
But also he complains when the cat asks him to fight the taints

One side I like tho, is how the "original roles" were kept here unlike BSD

2/3

*theme

since Atsushi KINDA is Dazai's mentee maybe his theme is a reference to *Run, Melos*

That's all for now tho..

3/3

in which the protagonist, Melos comes back to save his friend from death (idk how to explain)
and, it reminded me of BSD's Atsushi them which is Run, Atsushi (Hashire, Atsushi), particularly used in ep 10 (iirc) when he comes back to the boat to save Kyoka from Akutagawa

2/3