Surrogate character( 𩸽𠮟) from ruby on rails application gets saved to oracle database in question mark format (?)

Surrogate character( 𩸽𠮟) from ruby on rails application gets saved to oracle database in question mark format (?)

Ruby -2.4.1 Rails - 5.0 Oracle - 11.2

Using above configurations

firing below query

UPDATE table_name SET my_message = N'テストトト VP－𩸽𠮟' WHERE table_name.MERCHANT_ID = 'merchant4'  

While updating above record it gets saved to db as 'テストトト VP－？？'

Please suggest.

Thank you in advance.