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Integral Field Spectroscopy (IFS) with JWST NIRSpec will significantlyimprove our understanding of the first quasars, by providing spatiallyresolved, infrared spectroscopic capabilities which cover key rest-frameoptical emission lines that have been previously unobservable. Here we presentour results from the first two z>6 quasars observed as a part of the GalaxyAssembly with NIRSpec IFS (GA-NIFS) GTO program, DELS J0411-0907 at z=6.82 andVDES J0020-3653 at z=6.86. By observing the H$\beta$, [OIII], and H$\alpha$emission lines in these high-z quasars for the first time, we measure accurateblack hole masses, $M_{\rm{BH}}=1.85e9$ and $2.9e9$M$_\odot$, corresponding toEddington ratios of $\lambda_{\rm{Edd}}=0.8$ and 0.4 for DELS J0411-0907 andVDES J0020-3653 respectively. These provide a key comparison for existingestimates from the more uncertain MgII line. We perform quasar-hostdecomposition using models of the quasars' broad lines to measure theunderlying host galaxies. We also discover multiple emission line regionssurrounding each of the host galaxies, which are likely companion galaxiesundergoing mergers with these hosts. We measure the star formation rates,excitation mechanisms, and dynamical masses of the hosts and companions,measuring the $M_{\rm{BH}}/M_{\rm{dyn}}$ ratios at high-z using theseestimators for the first time. DELS J0411-0907 and VDES J0020-3653 both lieabove the local black hole--host mass relation, and are consistent with theexisting observations of $z\gtrsim6$ quasar host galaxies with ALMA. We detectionized outflows in [OIII] and H$\beta$ from both quasars, with mass outflowrates of 58 and 525 M$_{\odot}$/yr for DELS J0411-0907 and VDES J0020-3653,much larger than their host star formation rates of <33 and <54 M$_\odot$/yr.This work highlights the exceptional capabilities of the JWST NIRSpec IFU forobserving quasars in the early Universe.

GA-NIFS: Black hole and host galaxy properties of two z$\simeq$6.8 quasars from the NIRSpec IFU