My advice is not to embellish your speech with these sorts of meaningless expressions. Whenever someone says to me "To be honest with you..." or "To be absolutely frank..." I immediately suspect that they are not being honest or frank. Speak simply and plainly, and your honesty should be apparent to the listener.
I'm not sure that you are using "gentle" correctly. Do you really mean a gentle person, who is kind and soft in his or her manners and actions? Or, as I suspect, do you really mean a "gentleman" or "gentlewoman", in the sense of someone who is respectable and/or important?
Student or Learner