Arthur had three main reasons for involving the "Bandage Swordsman."
First, to make his own injury appear more realistic — only if an accident occurred while "guiding Lost Souls" could the rumors of his injury be substantiated.
Otherwise, it would be impossible for him to lose control of the secret technique, letting the "Bandage Swordsman" appear.
And with some subsequent searching, the second objective could be achieved —
Alert Line!
In the upcoming "Swordsmanship Finals" across the whole South County, Arthur had already laid hidden alert lines involving Jimte and Kalal.
There was no reason not to lay one in South Los as well.
None?
Then create one.
When he had Malz and Wiggins start to actively inquire about and search for the "Bandage Swordsman," such action couldn't possibly escape the notice of others.
Naturally, this would lead to speculation.
At that time, letting the "Bandage Swordsman" collaborate a bit might just produce unexpected effects.
And the third?