What Does Jesus Mean by "Fruit" in John 15?

Описание: John 15:1-8
“I am the true vine, and my Father is the gardener. 2 He cuts off every branch in me that bears no fruit, while every branch that does bear fruit he prunes[a] so that it will be even more fruitful. 3 You are already clean because of the word I have spoken to you. 4 Remain in me, as I also remain in you. No branch can bear fruit by itself; it must remain in the vine. Neither can you bear fruit unless you remain in me.
5 “I am the vine; you are the branches. If you remain in me and I in you, you will bear much fruit; apart from me you can do nothing. 6 If you do not remain in me, you are like a branch that is thrown away and withers; such branches are picked up, thrown into the fire and burned. 7 If you remain in me and my words remain in you, ask whatever you wish, and it will be done for you. 8 This is to my Father’s glory, that you bear much fruit, showing yourselves to be my disciples.”
NIV

John 15:16-17
“You did not choose me, but I chose you and appointed you so that you might go and bear fruit—fruit that will last—and so that whatever you ask in my name the Father will give you. 17 This is my command: Love each other.”

We must bear fruit! In fact, you can know if someone is a disciple by their fruit! In the passage we find God is described as a gardener. Jesus is described as a vine; And from the vine you have the branches, which are us, the disciples. However, "Fruit" is not defined. If I help someone become a disciple of Christ, are they my fruit or are they branches?

Fruit
Greek: καρπός
fruit: of trees, Mt 12:33 21:19, Mk 11:14, Lk 6:44 13:6-7; of vines, Mt 21:34, Mk 12:2, Lk 20:10, I Co 9:7; of fields, Mk 4:29, Lk 12:17, II Ti 2:6, Ja 5:7; βλαστάνειν, Ja 5:18; ποιεῖν (cf. Heb. פְּרִי עָשָׂה), Mt 3:10 7:17-19 13:26, Lk 3:9 6:43 8:8 13:9, Re 22:2; διδόναι, Mt 13:8, Mk 4:7-8; φέρειν, Mt 7:18, Jo 12:24 15:2, 4-5 15:8, 16; ἀποδιδόναι, Mt 21:41, Re 22:2; ὁ κ. τ. κοιλίας (בֶּטֶן פְּרִי, De 28:4), Lk 1:42; τ. ὀσφύος (Ge 30:2, al.), Ac 2:30.
Metaph.,
(a) of works, deeds: Mt 3:8 7:16, 20 21:43, Lk 3:8, Jo 15:3, 16; τ. πνεύματος, Ga 5:22; τ. φωτός, Eph 5:9; τ. δικαιοσύνης, Phl 1:11; σφραγίζεσθαι τὸν κ. (Deiss., BS, 238 f.), Ro 15:28; κ. ἀγαθοί, Ja 3:17;
(b) of advantage, profit: Phl 1:22 4:17; ἔχειν, Ro 1:13 6:21-22. συνάγειν, Jo 4:36; κ. τ. δικαιοσύνης, He 12:11, Ja 3:18; of praise, καρπὸν χειλέων (Ho 14:2, al.; cf. He 13:15.†
fruit (as plucked), literally or figuratively fruit.