Observe how vowels and consonants are shifted differently in the given pairs of letter clusters. Apply the same rule to find the missing pair.
$$\text{BENEATH : AFMFBSG : : DREAMER : CQFBLFQ : : ?}$$

Let's analyze the pattern for consonants and vowels in $\text{BENEATH}\to \text{AFMFBSG}$:
* $\text{B}$ (consonant) $-1=\text{A}$
* $\text{E}$ (vowel) $+1=\text{F}$
* $\text{N}$ (consonant) $-1=\text{M}$
* $\text{E}$ (vowel) $+1=\text{F}$
* $\text{A}$ (vowel) $+1=\text{B}$
* $\text{T}$ (consonant) $-1=\text{S}$
* $\text{H}$ (consonant) $-1=\text{G}$
Rule: Consonants are shifted by $-1$, and Vowels are shifted by $+1$.

Let's test this rule on $\text{CAPTURE}$:

* $\text{C}$ (consonant) $-1=\text{B}$
* $\text{A}$ (vowel) $+1=\text{B}$
* $\text{P}$ (consonant) $-1=\text{O}$
* $\text{T}$ (consonant) $-1=\text{S}$
* $\text{U}$ (vowel) $+1=\text{V}$
* $\text{R}$ (consonant) $-1=\text{Q}$
* $\text{E}$ (vowel) $+1=\text{F}$
Combining them, we get $\text{BBOSVQF}$.