Abdullah b. Mas'ud reported that Allah's Messenger (ﷺ) said: There is none amongst you with whom is not an attache from amongst the jinn (devil). They (the Companions) said: Allah's Messenger, with you too? Thereupon he said: Yes, but Allah helps me against him and so I am safe from his hand and he does not command me but for good.
This from Sahih Muslim Chapter: The Mischief Of The Shaitan And How He Sends His Troops To Tempt People, And With Every Person There Is A Qarin (Companion From Among The Jinn)
So Is there always a same jinn or shaitan (Qarin) with a person all the time and can someone able to refrain from his company.