Guild Wars 2

if i put soulbound items in the bank and then delete the character who owns the soulbound items , will those items remain in the bank or get deleted with the character?

They stay in the bank but remain soulbound to the character you deleted.

do trinkets go accountbound at the 15th patch?

They said that Ascended equipment will become account bound. Whether that includes Ascended trinkets or not is up for debate, but since they said “equipment” in general I’d say those may become account bound.