Revelation 1:7 uses the pronoun "ὅστις" :
[Revelation 1:7, KJV] "Behold, he cometh with clouds; and every eye shall see him, and they also which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen." ( 1:7 Ἰδού, ἔρχεται μετὰ τῶν νεφελῶν καὶ ὄψεται αὐτὸν πᾶς ὀφθαλμὸς καὶ οἵτινες αὐτὸν ἐξεκέντησαν καὶ κόψονται ἐπ᾽ αὐτὸν πᾶσαι αἱ φυλαὶ τῆς γῆς ναί ἀμήν )
Although the KJV interprets "ὅστις" as "they" in Revelation 1:7, the KJV version of John 19:34 states only "one of the soldiers" (εἷς τῶν στρατιωτῶν) pierced Ἰησοῦς:
[John 19:34, KJV] "But one of the soldiers with a spear pierced his side, and forthwith came there out blood and water." ( 19:34 ἀλλ᾽ εἷς τῶν στρατιωτῶν λόγχῃ αὐτοῦ τὴν πλευρὰν ἔνυξεν καὶ εὐθὺς ἐξῆλθεν αἷμα καὶ ὕδωρ )
Was "ὅστις" in Revelation 1:7 meant to be singular, since John 19:34 says only one of the soldiers pierced Ἰησοῦς?