Relation between the LyC escape fraction and the spatial offset of the neutral and/or low-ionization (as traced by Mg II, Δ_{[Mg II]−cont}, left panel) and ionized gas (as traced by [O II], Δ_{[O II]−cont}, middle panel) from the stellar continuum. The right panel shows $f_{\mathrm{esc}}^{\mathrm{LyC}}$ as a function of the Mg II spatial offset relative to the [O II] centroid (Δ_{Mg II−[O II]}). The red squares indicate the fraction of strong LyC leakers detected in the bin shown by the horizontal error bars. The errors on the fractions correspond to a 1σ confidence interval (see Sect. 4.1). Symbols legend is the same as Fig. 5. While weak and non LyC emitters show a wide diversity of Mg II and [O II] spatial offset from the continuum, leakers have no/weak offset due to their compact configurations (see Sect. 4.1).