Here is what Keith Warrington writes about Jesus in the book of Revelation in his survey of NT Christology, Discovering Jesus in the New Testament (my emphasis added). Worth reflection – it nails the upside-down and paradoxical nature of the Christian faith.
John describes Jesus as the Lamb twenty-eight times in the book of Revelation. This image, which reflects the Passover sacrifice of the OT, is a striking reminder to readers of the redemption Jesus achieved. The language of conquest and victory (5:5), which perhaps alludes to similar themes in Jewish literature, describes the redemption that the Lamb achieved. The Lamb who now stands alive and victorious, John says, has conquered his enemies by being slain (5:6, 12; 13:8). As the readers face death, John reminds them that Jesus also faced death and demonstrated the authenticity of his person and mission through death, for justice has determined that he would rise again, as would they. Like Jesus too, believers will declare the validity of their faith most powerfully at the moment of death, when they appear to be weakest. The most compelling picture of the relationship between the Lamb and believers is that of the church as the bride of the Lamb (21:9; 19:7-8) invited to “the marriage supper of the Lamb” (19:9). John presents Jesus as the bridegroom, a metaphor that the OT applied to God. As they worship God, so believers worship the Lamb of God – Jesus Christ (15:3). (p.200)