First I noticed from the scripture that the Holy Spirit is a Him, a person. Jesus told us that unless He Jesus went away, the Holy Spirit would not come to us, and Jesus called Him, 'The Comforter'. This is a title of the Holy Spirit. John 16.
A characteristic of the Holy Spirit is that 'He doesn't speak of Himself, but draws attention to Jesus and lifts Jesus up.'
John 16 King James Version (KJV)
16 These things have I spoken unto you, that ye should not be offended.
2 They shall put you out of the synagogues: yea, the time cometh, that whosoever killeth you will think that he doeth God service.
3 And these things will they do unto you, because they have not known the Father, nor me.
4 But these things have I told you, that when the time shall come, ye may remember that I told you of them. And these things I said not unto you at the beginning, because I was with you.
5 But now I go my way to him that sent me; and none of you asketh me, Whither goest thou?
6 But because I have said these things unto you, sorrow hath filled your heart.
7 Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you.
8 And when he is come, he will reprove the world of sin, and of righteousness, and of judgment:
9 Of sin, because they believe not on me;
10 Of righteousness, because I go to my Father, and ye see me no more;
11 Of judgment, because the prince of this world is judged.
12 I have yet many things to say unto you, but ye cannot bear them now.
13 Howbeit when he(a person), the Spirit of truth, is come, he(a person) will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
14 He shall glorify me: for he shall receive of mine, and shall shew it unto you.
15 All things that the Father hath are mine: therefore said I, that he shall take of mine, and shall shew it unto you.
The Holy Spirit can indwell people, and by this method He is the third party in a marriage where both people have Him inside them. (Christians)
The Holy Spirit is called The Comforter, with the idea of being all to us that would cause us to feel comforted and secure, picture ie. The Comforter on a bed, it warms you, it's soft, kind to the body and skin. The Holy Spirit would be this way to us, kind, and soft, warming and comforting.
The Holy Spirit may become a part of tangible objects, because we see from scripture the Holy Spirit acted upon the waters at creation, upon Mary's egg at Jesus' conception, ...somehow He mixed with oil during annointing, and His Presence may somehow act upon and change cloth, or other objects for His purposes, even animals may be acted upon in intrinsic ways producing unusual results, ie. the donkey in the Old Testament who could identify an invisible angel, and after that spoke a sentence of words.